diff options
| author | gdong1 <gdong1@6f19259b-4bc3-4df7-8a09-765794883524> | 2011-09-02 07:49:32 +0000 |
|---|---|---|
| committer | gdong1 <gdong1@6f19259b-4bc3-4df7-8a09-765794883524> | 2011-09-02 07:49:32 +0000 |
| commit | 0c18794ea4289f03fefc7117b56740414cc0536c (patch) | |
| tree | 4e51c5cc23c69a67cead8c58464da870daa4c029 /SecurityPkg/VariableAuthenticated/RuntimeDxe/Variable.c | |
| parent | 986d1dfb0813d6a7623531e85c2e2a7e1f956cf8 (diff) | |
| download | edk2-platforms-0c18794ea4289f03fefc7117b56740414cc0536c.tar.xz | |
Add security package to repository.
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12261 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'SecurityPkg/VariableAuthenticated/RuntimeDxe/Variable.c')
| -rw-r--r-- | SecurityPkg/VariableAuthenticated/RuntimeDxe/Variable.c | 2618 |
1 files changed, 2618 insertions, 0 deletions
diff --git a/SecurityPkg/VariableAuthenticated/RuntimeDxe/Variable.c b/SecurityPkg/VariableAuthenticated/RuntimeDxe/Variable.c new file mode 100644 index 0000000000..136bafefec --- /dev/null +++ b/SecurityPkg/VariableAuthenticated/RuntimeDxe/Variable.c @@ -0,0 +1,2618 @@ +/** @file
+ The common variable operation routines shared by DXE_RINTIME variable
+ module and DXE_SMM variable module.
+
+Copyright (c) 2009 - 2011, Intel Corporation. All rights reserved.<BR>
+This program and the accompanying materials
+are licensed and made available under the terms and conditions of the BSD License
+which accompanies this distribution. The full text of the license may be found at
+http://opensource.org/licenses/bsd-license.php
+
+THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#include "Variable.h"
+#include "AuthService.h"
+
+VARIABLE_MODULE_GLOBAL *mVariableModuleGlobal;
+
+///
+/// Define a memory cache that improves the search performance for a variable.
+///
+VARIABLE_STORE_HEADER *mNvVariableCache = NULL;
+
+///
+/// The memory entry used for variable statistics data.
+///
+VARIABLE_INFO_ENTRY *gVariableInfo = NULL;
+
+
+/**
+ Routine used to track statistical information about variable usage.
+ The data is stored in the EFI system table so it can be accessed later.
+ VariableInfo.efi can dump out the table. Only Boot Services variable
+ accesses are tracked by this code. The PcdVariableCollectStatistics
+ build flag controls if this feature is enabled.
+
+ A read that hits in the cache will have Read and Cache true for
+ the transaction. Data is allocated by this routine, but never
+ freed.
+
+ @param[in] VariableName Name of the Variable to track.
+ @param[in] VendorGuid Guid of the Variable to track.
+ @param[in] Volatile TRUE if volatile FALSE if non-volatile.
+ @param[in] Read TRUE if GetVariable() was called.
+ @param[in] Write TRUE if SetVariable() was called.
+ @param[in] Delete TRUE if deleted via SetVariable().
+ @param[in] Cache TRUE for a cache hit.
+
+**/
+VOID
+UpdateVariableInfo (
+ IN CHAR16 *VariableName,
+ IN EFI_GUID *VendorGuid,
+ IN BOOLEAN Volatile,
+ IN BOOLEAN Read,
+ IN BOOLEAN Write,
+ IN BOOLEAN Delete,
+ IN BOOLEAN Cache
+ )
+{
+ VARIABLE_INFO_ENTRY *Entry;
+
+ if (FeaturePcdGet (PcdVariableCollectStatistics)) {
+
+ if (AtRuntime ()) {
+ // Don't collect statistics at runtime.
+ return;
+ }
+
+ if (gVariableInfo == NULL) {
+ //
+ // On the first call allocate a entry and place a pointer to it in
+ // the EFI System Table.
+ //
+ gVariableInfo = AllocateZeroPool (sizeof (VARIABLE_INFO_ENTRY));
+ ASSERT (gVariableInfo != NULL);
+
+ CopyGuid (&gVariableInfo->VendorGuid, VendorGuid);
+ gVariableInfo->Name = AllocatePool (StrSize (VariableName));
+ ASSERT (gVariableInfo->Name != NULL);
+ StrCpy (gVariableInfo->Name, VariableName);
+ gVariableInfo->Volatile = Volatile;
+ }
+
+
+ for (Entry = gVariableInfo; Entry != NULL; Entry = Entry->Next) {
+ if (CompareGuid (VendorGuid, &Entry->VendorGuid)) {
+ if (StrCmp (VariableName, Entry->Name) == 0) {
+ if (Read) {
+ Entry->ReadCount++;
+ }
+ if (Write) {
+ Entry->WriteCount++;
+ }
+ if (Delete) {
+ Entry->DeleteCount++;
+ }
+ if (Cache) {
+ Entry->CacheCount++;
+ }
+
+ return;
+ }
+ }
+
+ if (Entry->Next == NULL) {
+ //
+ // If the entry is not in the table add it.
+ // Next iteration of the loop will fill in the data.
+ //
+ Entry->Next = AllocateZeroPool (sizeof (VARIABLE_INFO_ENTRY));
+ ASSERT (Entry->Next != NULL);
+
+ CopyGuid (&Entry->Next->VendorGuid, VendorGuid);
+ Entry->Next->Name = AllocatePool (StrSize (VariableName));
+ ASSERT (Entry->Next->Name != NULL);
+ StrCpy (Entry->Next->Name, VariableName);
+ Entry->Next->Volatile = Volatile;
+ }
+
+ }
+ }
+}
+
+
+/**
+
+ This code checks if variable header is valid or not.
+
+ @param Variable Pointer to the Variable Header.
+
+ @retval TRUE Variable header is valid.
+ @retval FALSE Variable header is not valid.
+
+**/
+BOOLEAN
+IsValidVariableHeader (
+ IN VARIABLE_HEADER *Variable
+ )
+{
+ if (Variable == NULL || Variable->StartId != VARIABLE_DATA) {
+ return FALSE;
+ }
+
+ return TRUE;
+}
+
+
+/**
+
+ This function writes data to the FWH at the correct LBA even if the LBAs
+ are fragmented.
+
+ @param Global Pointer to VARAIBLE_GLOBAL structure.
+ @param Volatile Point out the Variable is Volatile or Non-Volatile.
+ @param SetByIndex TRUE if target pointer is given as index.
+ FALSE if target pointer is absolute.
+ @param Fvb Pointer to the writable FVB protocol.
+ @param DataPtrIndex Pointer to the Data from the end of VARIABLE_STORE_HEADER
+ structure.
+ @param DataSize Size of data to be written.
+ @param Buffer Pointer to the buffer from which data is written.
+
+ @retval EFI_INVALID_PARAMETER Parameters not valid.
+ @retval EFI_SUCCESS Variable store successfully updated.
+
+**/
+EFI_STATUS
+UpdateVariableStore (
+ IN VARIABLE_GLOBAL *Global,
+ IN BOOLEAN Volatile,
+ IN BOOLEAN SetByIndex,
+ IN EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL *Fvb,
+ IN UINTN DataPtrIndex,
+ IN UINT32 DataSize,
+ IN UINT8 *Buffer
+ )
+{
+ EFI_FV_BLOCK_MAP_ENTRY *PtrBlockMapEntry;
+ UINTN BlockIndex2;
+ UINTN LinearOffset;
+ UINTN CurrWriteSize;
+ UINTN CurrWritePtr;
+ UINT8 *CurrBuffer;
+ EFI_LBA LbaNumber;
+ UINTN Size;
+ EFI_FIRMWARE_VOLUME_HEADER *FwVolHeader;
+ VARIABLE_STORE_HEADER *VolatileBase;
+ EFI_PHYSICAL_ADDRESS FvVolHdr;
+ EFI_PHYSICAL_ADDRESS DataPtr;
+ EFI_STATUS Status;
+
+ FwVolHeader = NULL;
+ DataPtr = DataPtrIndex;
+
+ //
+ // Check if the Data is Volatile.
+ //
+ if (!Volatile) {
+ ASSERT (Fvb != NULL);
+ Status = Fvb->GetPhysicalAddress(Fvb, &FvVolHdr);
+ ASSERT_EFI_ERROR (Status);
+
+ FwVolHeader = (EFI_FIRMWARE_VOLUME_HEADER *) ((UINTN) FvVolHdr);
+ //
+ // Data Pointer should point to the actual Address where data is to be
+ // written.
+ //
+ if (SetByIndex) {
+ DataPtr += mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase;
+ }
+
+ if ((DataPtr + DataSize) >= ((EFI_PHYSICAL_ADDRESS) (UINTN) ((UINT8 *) FwVolHeader + FwVolHeader->FvLength))) {
+ return EFI_INVALID_PARAMETER;
+ }
+ } else {
+ //
+ // Data Pointer should point to the actual Address where data is to be
+ // written.
+ //
+ VolatileBase = (VARIABLE_STORE_HEADER *) ((UINTN) mVariableModuleGlobal->VariableGlobal.VolatileVariableBase);
+ if (SetByIndex) {
+ DataPtr += mVariableModuleGlobal->VariableGlobal.VolatileVariableBase;
+ }
+
+ if ((DataPtr + DataSize) >= ((UINTN) ((UINT8 *) VolatileBase + VolatileBase->Size))) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ //
+ // If Volatile Variable just do a simple mem copy.
+ //
+ CopyMem ((UINT8 *)(UINTN)DataPtr, Buffer, DataSize);
+ return EFI_SUCCESS;
+ }
+
+ //
+ // If we are here we are dealing with Non-Volatile Variables.
+ //
+ LinearOffset = (UINTN) FwVolHeader;
+ CurrWritePtr = (UINTN) DataPtr;
+ CurrWriteSize = DataSize;
+ CurrBuffer = Buffer;
+ LbaNumber = 0;
+
+ if (CurrWritePtr < LinearOffset) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ for (PtrBlockMapEntry = FwVolHeader->BlockMap; PtrBlockMapEntry->NumBlocks != 0; PtrBlockMapEntry++) {
+ for (BlockIndex2 = 0; BlockIndex2 < PtrBlockMapEntry->NumBlocks; BlockIndex2++) {
+ //
+ // Check to see if the Variable Writes are spanning through multiple
+ // blocks.
+ //
+ if ((CurrWritePtr >= LinearOffset) && (CurrWritePtr < LinearOffset + PtrBlockMapEntry->Length)) {
+ if ((CurrWritePtr + CurrWriteSize) <= (LinearOffset + PtrBlockMapEntry->Length)) {
+ Status = Fvb->Write (
+ Fvb,
+ LbaNumber,
+ (UINTN) (CurrWritePtr - LinearOffset),
+ &CurrWriteSize,
+ CurrBuffer
+ );
+ return Status;
+ } else {
+ Size = (UINT32) (LinearOffset + PtrBlockMapEntry->Length - CurrWritePtr);
+ Status = Fvb->Write (
+ Fvb,
+ LbaNumber,
+ (UINTN) (CurrWritePtr - LinearOffset),
+ &Size,
+ CurrBuffer
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ CurrWritePtr = LinearOffset + PtrBlockMapEntry->Length;
+ CurrBuffer = CurrBuffer + Size;
+ CurrWriteSize = CurrWriteSize - Size;
+ }
+ }
+
+ LinearOffset += PtrBlockMapEntry->Length;
+ LbaNumber++;
+ }
+ }
+
+ return EFI_SUCCESS;
+}
+
+
+/**
+
+ This code gets the current status of Variable Store.
+
+ @param VarStoreHeader Pointer to the Variable Store Header.
+
+ @retval EfiRaw Variable store status is raw.
+ @retval EfiValid Variable store status is valid.
+ @retval EfiInvalid Variable store status is invalid.
+
+**/
+VARIABLE_STORE_STATUS
+GetVariableStoreStatus (
+ IN VARIABLE_STORE_HEADER *VarStoreHeader
+ )
+{
+ if (CompareGuid (&VarStoreHeader->Signature, &gEfiAuthenticatedVariableGuid) &&
+ VarStoreHeader->Format == VARIABLE_STORE_FORMATTED &&
+ VarStoreHeader->State == VARIABLE_STORE_HEALTHY
+ ) {
+
+ return EfiValid;
+ } else if (((UINT32 *)(&VarStoreHeader->Signature))[0] == 0xffffffff &&
+ ((UINT32 *)(&VarStoreHeader->Signature))[1] == 0xffffffff &&
+ ((UINT32 *)(&VarStoreHeader->Signature))[2] == 0xffffffff &&
+ ((UINT32 *)(&VarStoreHeader->Signature))[3] == 0xffffffff &&
+ VarStoreHeader->Size == 0xffffffff &&
+ VarStoreHeader->Format == 0xff &&
+ VarStoreHeader->State == 0xff
+ ) {
+
+ return EfiRaw;
+ } else {
+ return EfiInvalid;
+ }
+}
+
+
+/**
+
+ This code gets the size of name of variable.
+
+ @param Variable Pointer to the Variable Header.
+
+ @return UINTN Size of variable in bytes.
+
+**/
+UINTN
+NameSizeOfVariable (
+ IN VARIABLE_HEADER *Variable
+ )
+{
+ if (Variable->State == (UINT8) (-1) ||
+ Variable->DataSize == (UINT32) (-1) ||
+ Variable->NameSize == (UINT32) (-1) ||
+ Variable->Attributes == (UINT32) (-1)) {
+ return 0;
+ }
+ return (UINTN) Variable->NameSize;
+}
+
+/**
+
+ This code gets the size of variable data.
+
+ @param Variable Pointer to the Variable Header.
+
+ @return Size of variable in bytes.
+
+**/
+UINTN
+DataSizeOfVariable (
+ IN VARIABLE_HEADER *Variable
+ )
+{
+ if (Variable->State == (UINT8) (-1) ||
+ Variable->DataSize == (UINT32) (-1) ||
+ Variable->NameSize == (UINT32) (-1) ||
+ Variable->Attributes == (UINT32) (-1)) {
+ return 0;
+ }
+ return (UINTN) Variable->DataSize;
+}
+
+/**
+
+ This code gets the pointer to the variable name.
+
+ @param Variable Pointer to the Variable Header.
+
+ @return Pointer to Variable Name which is Unicode encoding.
+
+**/
+CHAR16 *
+GetVariableNamePtr (
+ IN VARIABLE_HEADER *Variable
+ )
+{
+
+ return (CHAR16 *) (Variable + 1);
+}
+
+/**
+
+ This code gets the pointer to the variable data.
+
+ @param Variable Pointer to the Variable Header.
+
+ @return Pointer to Variable Data.
+
+**/
+UINT8 *
+GetVariableDataPtr (
+ IN VARIABLE_HEADER *Variable
+ )
+{
+ UINTN Value;
+
+ //
+ // Be careful about pad size for alignment.
+ //
+ Value = (UINTN) GetVariableNamePtr (Variable);
+ Value += NameSizeOfVariable (Variable);
+ Value += GET_PAD_SIZE (NameSizeOfVariable (Variable));
+
+ return (UINT8 *) Value;
+}
+
+
+/**
+
+ This code gets the pointer to the next variable header.
+
+ @param Variable Pointer to the Variable Header.
+
+ @return Pointer to next variable header.
+
+**/
+VARIABLE_HEADER *
+GetNextVariablePtr (
+ IN VARIABLE_HEADER *Variable
+ )
+{
+ UINTN Value;
+
+ if (!IsValidVariableHeader (Variable)) {
+ return NULL;
+ }
+
+ Value = (UINTN) GetVariableDataPtr (Variable);
+ Value += DataSizeOfVariable (Variable);
+ Value += GET_PAD_SIZE (DataSizeOfVariable (Variable));
+
+ //
+ // Be careful about pad size for alignment.
+ //
+ return (VARIABLE_HEADER *) HEADER_ALIGN (Value);
+}
+
+/**
+
+ Gets the pointer to the first variable header in given variable store area.
+
+ @param VarStoreHeader Pointer to the Variable Store Header.
+
+ @return Pointer to the first variable header.
+
+**/
+VARIABLE_HEADER *
+GetStartPointer (
+ IN VARIABLE_STORE_HEADER *VarStoreHeader
+ )
+{
+ //
+ // The end of variable store.
+ //
+ return (VARIABLE_HEADER *) HEADER_ALIGN (VarStoreHeader + 1);
+}
+
+/**
+
+ Gets the pointer to the end of the variable storage area.
+
+ This function gets pointer to the end of the variable storage
+ area, according to the input variable store header.
+
+ @param VarStoreHeader Pointer to the Variable Store Header.
+
+ @return Pointer to the end of the variable storage area.
+
+**/
+VARIABLE_HEADER *
+GetEndPointer (
+ IN VARIABLE_STORE_HEADER *VarStoreHeader
+ )
+{
+ //
+ // The end of variable store
+ //
+ return (VARIABLE_HEADER *) HEADER_ALIGN ((UINTN) VarStoreHeader + VarStoreHeader->Size);
+}
+
+
+/**
+
+ Variable store garbage collection and reclaim operation.
+
+ @param VariableBase Base address of variable store.
+ @param LastVariableOffset Offset of last variable.
+ @param IsVolatile The variable store is volatile or not;
+ if it is non-volatile, need FTW.
+ @param UpdatingVariable Pointer to updating variable.
+
+ @return EFI_OUT_OF_RESOURCES
+ @return EFI_SUCCESS
+ @return Others
+
+**/
+EFI_STATUS
+Reclaim (
+ IN EFI_PHYSICAL_ADDRESS VariableBase,
+ OUT UINTN *LastVariableOffset,
+ IN BOOLEAN IsVolatile,
+ IN VARIABLE_HEADER *UpdatingVariable
+ )
+{
+ VARIABLE_HEADER *Variable;
+ VARIABLE_HEADER *AddedVariable;
+ VARIABLE_HEADER *NextVariable;
+ VARIABLE_HEADER *NextAddedVariable;
+ VARIABLE_STORE_HEADER *VariableStoreHeader;
+ UINT8 *ValidBuffer;
+ UINTN MaximumBufferSize;
+ UINTN VariableSize;
+ UINTN VariableNameSize;
+ UINTN UpdatingVariableNameSize;
+ UINTN NameSize;
+ UINT8 *CurrPtr;
+ VOID *Point0;
+ VOID *Point1;
+ BOOLEAN FoundAdded;
+ EFI_STATUS Status;
+ CHAR16 *VariableNamePtr;
+ CHAR16 *UpdatingVariableNamePtr;
+
+ VariableStoreHeader = (VARIABLE_STORE_HEADER *) ((UINTN) VariableBase);
+ //
+ // Recalculate the total size of Common/HwErr type variables in non-volatile area.
+ //
+ if (!IsVolatile) {
+ mVariableModuleGlobal->CommonVariableTotalSize = 0;
+ mVariableModuleGlobal->HwErrVariableTotalSize = 0;
+ }
+
+ //
+ // Start Pointers for the variable.
+ //
+ Variable = GetStartPointer (VariableStoreHeader);
+ MaximumBufferSize = sizeof (VARIABLE_STORE_HEADER);
+
+ while (IsValidVariableHeader (Variable)) {
+ NextVariable = GetNextVariablePtr (Variable);
+ if (Variable->State == VAR_ADDED ||
+ Variable->State == (VAR_IN_DELETED_TRANSITION & VAR_ADDED)
+ ) {
+ VariableSize = (UINTN) NextVariable - (UINTN) Variable;
+ MaximumBufferSize += VariableSize;
+ }
+
+ Variable = NextVariable;
+ }
+
+ //
+ // Reserve the 1 Bytes with Oxff to identify the
+ // end of the variable buffer.
+ //
+ MaximumBufferSize += 1;
+ ValidBuffer = AllocatePool (MaximumBufferSize);
+ if (ValidBuffer == NULL) {
+ return EFI_OUT_OF_RESOURCES;
+ }
+
+ SetMem (ValidBuffer, MaximumBufferSize, 0xff);
+
+ //
+ // Copy variable store header.
+ //
+ CopyMem (ValidBuffer, VariableStoreHeader, sizeof (VARIABLE_STORE_HEADER));
+ CurrPtr = (UINT8 *) GetStartPointer ((VARIABLE_STORE_HEADER *) ValidBuffer);
+
+ //
+ // Reinstall all ADDED variables as long as they are not identical to Updating Variable.
+ //
+ Variable = GetStartPointer (VariableStoreHeader);
+ while (IsValidVariableHeader (Variable)) {
+ NextVariable = GetNextVariablePtr (Variable);
+ if (Variable->State == VAR_ADDED) {
+ if (UpdatingVariable != NULL) {
+ if (UpdatingVariable == Variable) {
+ Variable = NextVariable;
+ continue;
+ }
+
+ VariableNameSize = NameSizeOfVariable(Variable);
+ UpdatingVariableNameSize = NameSizeOfVariable(UpdatingVariable);
+
+ VariableNamePtr = GetVariableNamePtr (Variable);
+ UpdatingVariableNamePtr = GetVariableNamePtr (UpdatingVariable);
+ if (CompareGuid (&Variable->VendorGuid, &UpdatingVariable->VendorGuid) &&
+ VariableNameSize == UpdatingVariableNameSize &&
+ CompareMem (VariableNamePtr, UpdatingVariableNamePtr, VariableNameSize) == 0 ) {
+ Variable = NextVariable;
+ continue;
+ }
+ }
+ VariableSize = (UINTN) NextVariable - (UINTN) Variable;
+ CopyMem (CurrPtr, (UINT8 *) Variable, VariableSize);
+ CurrPtr += VariableSize;
+ if ((!IsVolatile) && ((Variable->Attributes & EFI_VARIABLE_HARDWARE_ERROR_RECORD) == EFI_VARIABLE_HARDWARE_ERROR_RECORD)) {
+ mVariableModuleGlobal->HwErrVariableTotalSize += VariableSize;
+ } else if ((!IsVolatile) && ((Variable->Attributes & EFI_VARIABLE_HARDWARE_ERROR_RECORD) != EFI_VARIABLE_HARDWARE_ERROR_RECORD)) {
+ mVariableModuleGlobal->CommonVariableTotalSize += VariableSize;
+ }
+ }
+ Variable = NextVariable;
+ }
+
+ //
+ // Reinstall the variable being updated if it is not NULL.
+ //
+ if (UpdatingVariable != NULL) {
+ VariableSize = (UINTN)(GetNextVariablePtr (UpdatingVariable)) - (UINTN)UpdatingVariable;
+ CopyMem (CurrPtr, (UINT8 *) UpdatingVariable, VariableSize);
+ CurrPtr += VariableSize;
+ if ((!IsVolatile) && ((UpdatingVariable->Attributes & EFI_VARIABLE_HARDWARE_ERROR_RECORD) == EFI_VARIABLE_HARDWARE_ERROR_RECORD)) {
+ mVariableModuleGlobal->HwErrVariableTotalSize += VariableSize;
+ } else if ((!IsVolatile) && ((UpdatingVariable->Attributes & EFI_VARIABLE_HARDWARE_ERROR_RECORD) != EFI_VARIABLE_HARDWARE_ERROR_RECORD)) {
+ mVariableModuleGlobal->CommonVariableTotalSize += VariableSize;
+ }
+ }
+
+ //
+ // Reinstall all in delete transition variables.
+ //
+ Variable = GetStartPointer (VariableStoreHeader);
+ while (IsValidVariableHeader (Variable)) {
+ NextVariable = GetNextVariablePtr (Variable);
+ if (Variable != UpdatingVariable && Variable->State == (VAR_IN_DELETED_TRANSITION & VAR_ADDED)) {
+
+ //
+ // Buffer has cached all ADDED variable.
+ // Per IN_DELETED variable, we have to guarantee that
+ // no ADDED one in previous buffer.
+ //
+
+ FoundAdded = FALSE;
+ AddedVariable = GetStartPointer ((VARIABLE_STORE_HEADER *) ValidBuffer);
+ while (IsValidVariableHeader (AddedVariable)) {
+ NextAddedVariable = GetNextVariablePtr (AddedVariable);
+ NameSize = NameSizeOfVariable (AddedVariable);
+ if (CompareGuid (&AddedVariable->VendorGuid, &Variable->VendorGuid) &&
+ NameSize == NameSizeOfVariable (Variable)
+ ) {
+ Point0 = (VOID *) GetVariableNamePtr (AddedVariable);
+ Point1 = (VOID *) GetVariableNamePtr (Variable);
+ if (CompareMem (Point0, Point1, NameSizeOfVariable (AddedVariable)) == 0) {
+ FoundAdded = TRUE;
+ break;
+ }
+ }
+ AddedVariable = NextAddedVariable;
+ }
+ if (!FoundAdded) {
+ //
+ // Promote VAR_IN_DELETED_TRANSITION to VAR_ADDED.
+ //
+ VariableSize = (UINTN) NextVariable - (UINTN) Variable;
+ CopyMem (CurrPtr, (UINT8 *) Variable, VariableSize);
+ ((VARIABLE_HEADER *) CurrPtr)->State = VAR_ADDED;
+ CurrPtr += VariableSize;
+ if ((!IsVolatile) && ((Variable->Attributes & EFI_VARIABLE_HARDWARE_ERROR_RECORD) == EFI_VARIABLE_HARDWARE_ERROR_RECORD)) {
+ mVariableModuleGlobal->HwErrVariableTotalSize += VariableSize;
+ } else if ((!IsVolatile) && ((Variable->Attributes & EFI_VARIABLE_HARDWARE_ERROR_RECORD) != EFI_VARIABLE_HARDWARE_ERROR_RECORD)) {
+ mVariableModuleGlobal->CommonVariableTotalSize += VariableSize;
+ }
+ }
+ }
+
+ Variable = NextVariable;
+ }
+
+ if (IsVolatile) {
+ //
+ // If volatile variable store, just copy valid buffer.
+ //
+ SetMem ((UINT8 *) (UINTN) VariableBase, VariableStoreHeader->Size, 0xff);
+ CopyMem ((UINT8 *) (UINTN) VariableBase, ValidBuffer, (UINTN) (CurrPtr - (UINT8 *) ValidBuffer));
+ Status = EFI_SUCCESS;
+ } else {
+ //
+ // If non-volatile variable store, perform FTW here.
+ //
+ Status = FtwVariableSpace (
+ VariableBase,
+ ValidBuffer,
+ (UINTN) (CurrPtr - (UINT8 *) ValidBuffer)
+ );
+ CopyMem (mNvVariableCache, (CHAR8 *)(UINTN)VariableBase, VariableStoreHeader->Size);
+ }
+ if (!EFI_ERROR (Status)) {
+ *LastVariableOffset = (UINTN) (CurrPtr - (UINT8 *) ValidBuffer);
+ } else {
+ *LastVariableOffset = 0;
+ }
+
+ FreePool (ValidBuffer);
+
+ return Status;
+}
+
+
+/**
+ Finds variable in storage blocks of volatile and non-volatile storage areas.
+
+ This code finds variable in storage blocks of volatile and non-volatile storage areas.
+ If VariableName is an empty string, then we just return the first
+ qualified variable without comparing VariableName and VendorGuid.
+ Otherwise, VariableName and VendorGuid are compared.
+
+ @param VariableName Name of the variable to be found.
+ @param VendorGuid Vendor GUID to be found.
+ @param PtrTrack VARIABLE_POINTER_TRACK structure for output,
+ including the range searched and the target position.
+ @param Global Pointer to VARIABLE_GLOBAL structure, including
+ base of volatile variable storage area, base of
+ NV variable storage area, and a lock.
+
+ @retval EFI_INVALID_PARAMETER If VariableName is not an empty string, while
+ VendorGuid is NULL.
+ @retval EFI_SUCCESS Variable successfully found.
+ @retval EFI_NOT_FOUND Variable not found
+
+**/
+EFI_STATUS
+FindVariable (
+ IN CHAR16 *VariableName,
+ IN EFI_GUID *VendorGuid,
+ OUT VARIABLE_POINTER_TRACK *PtrTrack,
+ IN VARIABLE_GLOBAL *Global
+ )
+{
+ VARIABLE_HEADER *Variable[2];
+ VARIABLE_HEADER *InDeletedVariable;
+ VARIABLE_STORE_HEADER *VariableStoreHeader[2];
+ UINTN InDeletedStorageIndex;
+ UINTN Index;
+ VOID *Point;
+
+ //
+ // 0: Volatile, 1: Non-Volatile.
+ // The index and attributes mapping must be kept in this order as RuntimeServiceGetNextVariableName
+ // make use of this mapping to implement search algorithm.
+ //
+ VariableStoreHeader[0] = (VARIABLE_STORE_HEADER *) ((UINTN) mVariableModuleGlobal->VariableGlobal.VolatileVariableBase);
+ VariableStoreHeader[1] = mNvVariableCache;
+
+ //
+ // Start Pointers for the variable.
+ // Actual Data Pointer where data can be written.
+ //
+ Variable[0] = GetStartPointer (VariableStoreHeader[0]);
+ Variable[1] = GetStartPointer (VariableStoreHeader[1]);
+
+ if (VariableName[0] != 0 && VendorGuid == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ //
+ // Find the variable by walk through volatile and then non-volatile variable store.
+ //
+ InDeletedVariable = NULL;
+ InDeletedStorageIndex = 0;
+ for (Index = 0; Index < 2; Index++) {
+ while ((Variable[Index] < GetEndPointer (VariableStoreHeader[Index])) && IsValidVariableHeader (Variable[Index])) {
+ if (Variable[Index]->State == VAR_ADDED ||
+ Variable[Index]->State == (VAR_IN_DELETED_TRANSITION & VAR_ADDED)
+ ) {
+ if (!AtRuntime () || ((Variable[Index]->Attributes & EFI_VARIABLE_RUNTIME_ACCESS) != 0)) {
+ if (VariableName[0] == 0) {
+ if (Variable[Index]->State == (VAR_IN_DELETED_TRANSITION & VAR_ADDED)) {
+ InDeletedVariable = Variable[Index];
+ InDeletedStorageIndex = Index;
+ } else {
+ PtrTrack->StartPtr = GetStartPointer (VariableStoreHeader[Index]);
+ PtrTrack->EndPtr = GetEndPointer (VariableStoreHeader[Index]);
+ PtrTrack->CurrPtr = Variable[Index];
+ PtrTrack->Volatile = (BOOLEAN)(Index == 0);
+
+ return EFI_SUCCESS;
+ }
+ } else {
+ if (CompareGuid (VendorGuid, &Variable[Index]->VendorGuid)) {
+ Point = (VOID *) GetVariableNamePtr (Variable[Index]);
+
+ ASSERT (NameSizeOfVariable (Variable[Index]) != 0);
+ if (CompareMem (VariableName, Point, NameSizeOfVariable (Variable[Index])) == 0) {
+ if (Variable[Index]->State == (VAR_IN_DELETED_TRANSITION & VAR_ADDED)) {
+ InDeletedVariable = Variable[Index];
+ InDeletedStorageIndex = Index;
+ } else {
+ PtrTrack->StartPtr = GetStartPointer (VariableStoreHeader[Index]);
+ PtrTrack->EndPtr = GetEndPointer (VariableStoreHeader[Index]);
+ PtrTrack->CurrPtr = Variable[Index];
+ PtrTrack->Volatile = (BOOLEAN)(Index == 0);
+
+ return EFI_SUCCESS;
+ }
+ }
+ }
+ }
+ }
+ }
+
+ Variable[Index] = GetNextVariablePtr (Variable[Index]);
+ }
+ if (InDeletedVariable != NULL) {
+ PtrTrack->StartPtr = GetStartPointer (VariableStoreHeader[InDeletedStorageIndex]);
+ PtrTrack->EndPtr = GetEndPointer (VariableStoreHeader[InDeletedStorageIndex]);
+ PtrTrack->CurrPtr = InDeletedVariable;
+ PtrTrack->Volatile = (BOOLEAN)(InDeletedStorageIndex == 0);
+ return EFI_SUCCESS;
+ }
+ }
+ PtrTrack->CurrPtr = NULL;
+ return EFI_NOT_FOUND;
+}
+
+/**
+ Get index from supported language codes according to language string.
+
+ This code is used to get corresponding index in supported language codes. It can handle
+ RFC4646 and ISO639 language tags.
+ In ISO639 language tags, take 3-characters as a delimitation to find matched string and calculate the index.
+ In RFC4646 language tags, take semicolon as a delimitation to find matched string and calculate the index.
+
+ For example:
+ SupportedLang = "engfraengfra"
+ Lang = "eng"
+ Iso639Language = TRUE
+ The return value is "0".
+ Another example:
+ SupportedLang = "en;fr;en-US;fr-FR"
+ Lang = "fr-FR"
+ Iso639Language = FALSE
+ The return value is "3".
+
+ @param SupportedLang Platform supported language codes.
+ @param Lang Configured language.
+ @param Iso639Language A bool value to signify if the handler is operated on ISO639 or RFC4646.
+
+ @retval The index of language in the language codes.
+
+**/
+UINTN
+GetIndexFromSupportedLangCodes(
+ IN CHAR8 *SupportedLang,
+ IN CHAR8 *Lang,
+ IN BOOLEAN Iso639Language
+ )
+{
+ UINTN Index;
+ UINTN CompareLength;
+ UINTN LanguageLength;
+
+ if (Iso639Language) {
+ CompareLength = ISO_639_2_ENTRY_SIZE;
+ for (Index = 0; Index < AsciiStrLen (SupportedLang); Index += CompareLength) {
+ if (AsciiStrnCmp (Lang, SupportedLang + Index, CompareLength) == 0) {
+ //
+ // Successfully find the index of Lang string in SupportedLang string.
+ //
+ Index = Index / CompareLength;
+ return Index;
+ }
+ }
+ ASSERT (FALSE);
+ return 0;
+ } else {
+ //
+ // Compare RFC4646 language code
+ //
+ Index = 0;
+ for (LanguageLength = 0; Lang[LanguageLength] != '\0'; LanguageLength++);
+
+ for (Index = 0; *SupportedLang != '\0'; Index++, SupportedLang += CompareLength) {
+ //
+ // Skip ';' characters in SupportedLang
+ //
+ for (; *SupportedLang != '\0' && *SupportedLang == ';'; SupportedLang++);
+ //
+ // Determine the length of the next language code in SupportedLang
+ //
+ for (CompareLength = 0; SupportedLang[CompareLength] != '\0' && SupportedLang[CompareLength] != ';'; CompareLength++);
+
+ if ((CompareLength == LanguageLength) &&
+ (AsciiStrnCmp (Lang, SupportedLang, CompareLength) == 0)) {
+ //
+ // Successfully find the index of Lang string in SupportedLang string.
+ //
+ return Index;
+ }
+ }
+ ASSERT (FALSE);
+ return 0;
+ }
+}
+
+/**
+ Get language string from supported language codes according to index.
+
+ This code is used to get corresponding language strings in supported language codes. It can handle
+ RFC4646 and ISO639 language tags.
+ In ISO639 language tags, take 3-characters as a delimitation. Find language string according to the index.
+ In RFC4646 language tags, take semicolon as a delimitation. Find language string according to the index.
+
+ For example:
+ SupportedLang = "engfraengfra"
+ Index = "1"
+ Iso639Language = TRUE
+ The return value is "fra".
+ Another example:
+ SupportedLang = "en;fr;en-US;fr-FR"
+ Index = "1"
+ Iso639Language = FALSE
+ The return value is "fr".
+
+ @param SupportedLang Platform supported language codes.
+ @param Index The index in supported language codes.
+ @param Iso639Language A bool value to signify if the handler is operated on ISO639 or RFC4646.
+
+ @retval The language string in the language codes.
+
+**/
+CHAR8 *
+GetLangFromSupportedLangCodes (
+ IN CHAR8 *SupportedLang,
+ IN UINTN Index,
+ IN BOOLEAN Iso639Language
+)
+{
+ UINTN SubIndex;
+ UINTN CompareLength;
+ CHAR8 *Supported;
+
+ SubIndex = 0;
+ Supported = SupportedLang;
+ if (Iso639Language) {
+ //
+ // According to the index of Lang string in SupportedLang string to get the language.
+ // This code will be invoked in RUNTIME, therefore there is not a memory allocate/free operation.
+ // In driver entry, it pre-allocates a runtime attribute memory to accommodate this string.
+ //
+ CompareLength = ISO_639_2_ENTRY_SIZE;
+ mVariableModuleGlobal->Lang[CompareLength] = '\0';
+ return CopyMem (mVariableModuleGlobal->Lang, SupportedLang + Index * CompareLength, CompareLength);
+
+ } else {
+ while (TRUE) {
+ //
+ // Take semicolon as delimitation, sequentially traverse supported language codes.
+ //
+ for (CompareLength = 0; *Supported != ';' && *Supported != '\0'; CompareLength++) {
+ Supported++;
+ }
+ if ((*Supported == '\0') && (SubIndex != Index)) {
+ //
+ // Have completed the traverse, but not find corrsponding string.
+ // This case is not allowed to happen.
+ //
+ ASSERT(FALSE);
+ return NULL;
+ }
+ if (SubIndex == Index) {
+ //
+ // According to the index of Lang string in SupportedLang string to get the language.
+ // As this code will be invoked in RUNTIME, therefore there is not memory allocate/free operation.
+ // In driver entry, it pre-allocates a runtime attribute memory to accommodate this string.
+ //
+ mVariableModuleGlobal->PlatformLang[CompareLength] = '\0';
+ return CopyMem (mVariableModuleGlobal->PlatformLang, Supported - CompareLength, CompareLength);
+ }
+ SubIndex++;
+
+ //
+ // Skip ';' characters in Supported
+ //
+ for (; *Supported != '\0' && *Supported == ';'; Supported++);
+ }
+ }
+}
+
+/**
+ Returns a pointer to an allocated buffer that contains the best matching language
+ from a set of supported languages.
+
+ This function supports both ISO 639-2 and RFC 4646 language codes, but language
+ code types may not be mixed in a single call to this function. This function
+ supports a variable argument list that allows the caller to pass in a prioritized
+ list of language codes to test against all the language codes in SupportedLanguages.
+
+ If SupportedLanguages is NULL, then ASSERT().
+
+ @param[in] SupportedLanguages A pointer to a Null-terminated ASCII string that
+ contains a set of language codes in the format
+ specified by Iso639Language.
+ @param[in] Iso639Language If TRUE, then all language codes are assumed to be
+ in ISO 639-2 format. If FALSE, then all language
+ codes are assumed to be in RFC 4646 language format
+ @param[in] ... A variable argument list that contains pointers to
+ Null-terminated ASCII strings that contain one or more
+ language codes in the format specified by Iso639Language.
+ The first language code from each of these language
+ code lists is used to determine if it is an exact or
+ close match to any of the language codes in
+ SupportedLanguages. Close matches only apply to RFC 4646
+ language codes, and the matching algorithm from RFC 4647
+ is used to determine if a close match is present. If
+ an exact or close match is found, then the matching
+ language code from SupportedLanguages is returned. If
+ no matches are found, then the next variable argument
+ parameter is evaluated. The variable argument list
+ is terminated by a NULL.
+
+ @retval NULL The best matching language could not be found in SupportedLanguages.
+ @retval NULL There are not enough resources available to return the best matching
+ language.
+ @retval Other A pointer to a Null-terminated ASCII string that is the best matching
+ language in SupportedLanguages.
+
+**/
+CHAR8 *
+EFIAPI
+VariableGetBestLanguage (
+ IN CONST CHAR8 *SupportedLanguages,
+ IN BOOLEAN Iso639Language,
+ ...
+ )
+{
+ VA_LIST Args;
+ CHAR8 *Language;
+ UINTN CompareLength;
+ UINTN LanguageLength;
+ CONST CHAR8 *Supported;
+ CHAR8 *Buffer;
+
+ ASSERT (SupportedLanguages != NULL);
+
+ VA_START (Args, Iso639Language);
+ while ((Language = VA_ARG (Args, CHAR8 *)) != NULL) {
+ //
+ // Default to ISO 639-2 mode
+ //
+ CompareLength = 3;
+ LanguageLength = MIN (3, AsciiStrLen (Language));
+
+ //
+ // If in RFC 4646 mode, then determine the length of the first RFC 4646 language code in Language
+ //
+ if (!Iso639Language) {
+ for (LanguageLength = 0; Language[LanguageLength] != 0 && Language[LanguageLength] != ';'; LanguageLength++);
+ }
+
+ //
+ // Trim back the length of Language used until it is empty
+ //
+ while (LanguageLength > 0) {
+ //
+ // Loop through all language codes in SupportedLanguages
+ //
+ for (Supported = SupportedLanguages; *Supported != '\0'; Supported += CompareLength) {
+ //
+ // In RFC 4646 mode, then Loop through all language codes in SupportedLanguages
+ //
+ if (!Iso639Language) {
+ //
+ // Skip ';' characters in Supported
+ //
+ for (; *Supported != '\0' && *Supported == ';'; Supported++);
+ //
+ // Determine the length of the next language code in Supported
+ //
+ for (CompareLength = 0; Supported[CompareLength] != 0 && Supported[CompareLength] != ';'; CompareLength++);
+ //
+ // If Language is longer than the Supported, then skip to the next language
+ //
+ if (LanguageLength > CompareLength) {
+ continue;
+ }
+ }
+ //
+ // See if the first LanguageLength characters in Supported match Language
+ //
+ if (AsciiStrnCmp (Supported, Language, LanguageLength) == 0) {
+ VA_END (Args);
+
+ Buffer = Iso639Language ? mVariableModuleGlobal->Lang : mVariableModuleGlobal->PlatformLang;
+ Buffer[CompareLength] = '\0';
+ return CopyMem (Buffer, Supported, CompareLength);
+ }
+ }
+
+ if (Iso639Language) {
+ //
+ // If ISO 639 mode, then each language can only be tested once
+ //
+ LanguageLength = 0;
+ } else {
+ //
+ // If RFC 4646 mode, then trim Language from the right to the next '-' character
+ //
+ for (LanguageLength--; LanguageLength > 0 && Language[LanguageLength] != '-'; LanguageLength--);
+ }
+ }
+ }
+ VA_END (Args);
+
+ //
+ // No matches were found
+ //
+ return NULL;
+}
+
+/**
+ Hook the operations in PlatformLangCodes, LangCodes, PlatformLang and Lang.
+
+ When setting Lang/LangCodes, simultaneously update PlatformLang/PlatformLangCodes.
+
+ According to UEFI spec, PlatformLangCodes/LangCodes are only set once in firmware initialization,
+ and are read-only. Therefore, in variable driver, only store the original value for other use.
+
+ @param[in] VariableName Name of variable.
+
+ @param[in] Data Variable data.
+
+ @param[in] DataSize Size of data. 0 means delete.
+
+**/
+VOID
+AutoUpdateLangVariable(
+ IN CHAR16 *VariableName,
+ IN VOID *Data,
+ IN UINTN DataSize
+ )
+{
+ EFI_STATUS Status;
+ CHAR8 *BestPlatformLang;
+ CHAR8 *BestLang;
+ UINTN Index;
+ UINT32 Attributes;
+ VARIABLE_POINTER_TRACK Variable;
+ BOOLEAN SetLanguageCodes;
+
+ //
+ // Don't do updates for delete operation
+ //
+ if (DataSize == 0) {
+ return;
+ }
+
+ SetLanguageCodes = FALSE;
+
+ if (StrCmp (VariableName, L"PlatformLangCodes") == 0) {
+ //
+ // PlatformLangCodes is a volatile variable, so it can not be updated at runtime.
+ //
+ if (AtRuntime ()) {
+ return;
+ }
+
+ SetLanguageCodes = TRUE;
+
+ //
+ // According to UEFI spec, PlatformLangCodes is only set once in firmware initialization, and is read-only
+ // Therefore, in variable driver, only store the original value for other use.
+ //
+ if (mVariableModuleGlobal->PlatformLangCodes != NULL) {
+ FreePool (mVariableModuleGlobal->PlatformLangCodes);
+ }
+ mVariableModuleGlobal->PlatformLangCodes = AllocateRuntimeCopyPool (DataSize, Data);
+ ASSERT (mVariableModuleGlobal->PlatformLangCodes != NULL);
+
+ //
+ // PlatformLang holds a single language from PlatformLangCodes,
+ // so the size of PlatformLangCodes is enough for the PlatformLang.
+ //
+ if (mVariableModuleGlobal->PlatformLang != NULL) {
+ FreePool (mVariableModuleGlobal->PlatformLang);
+ }
+ mVariableModuleGlobal->PlatformLang = AllocateRuntimePool (DataSize);
+ ASSERT (mVariableModuleGlobal->PlatformLang != NULL);
+
+ } else if (StrCmp (VariableName, L"LangCodes") == 0) {
+ //
+ // LangCodes is a volatile variable, so it can not be updated at runtime.
+ //
+ if (AtRuntime ()) {
+ return;
+ }
+
+ SetLanguageCodes = TRUE;
+
+ //
+ // According to UEFI spec, LangCodes is only set once in firmware initialization, and is read-only
+ // Therefore, in variable driver, only store the original value for other use.
+ //
+ if (mVariableModuleGlobal->LangCodes != NULL) {
+ FreePool (mVariableModuleGlobal->LangCodes);
+ }
+ mVariableModuleGlobal->LangCodes = AllocateRuntimeCopyPool (DataSize, Data);
+ ASSERT (mVariableModuleGlobal->LangCodes != NULL);
+ }
+
+ if (SetLanguageCodes
+ && (mVariableModuleGlobal->PlatformLangCodes != NULL)
+ && (mVariableModuleGlobal->LangCodes != NULL)) {
+ //
+ // Update Lang if PlatformLang is already set
+ // Update PlatformLang if Lang is already set
+ //
+ Status = FindVariable (L"PlatformLang", &gEfiGlobalVariableGuid, &Variable, (VARIABLE_GLOBAL *) mVariableModuleGlobal);
+ if (!EFI_ERROR (Status)) {
+ //
+ // Update Lang
+ //
+ VariableName = L"PlatformLang";
+ Data = GetVariableDataPtr (Variable.CurrPtr);
+ DataSize = Variable.CurrPtr->DataSize;
+ } else {
+ Status = FindVariable (L"Lang", &gEfiGlobalVariableGuid, &Variable, (VARIABLE_GLOBAL *) mVariableModuleGlobal);
+ if (!EFI_ERROR (Status)) {
+ //
+ // Update PlatformLang
+ //
+ VariableName = L"Lang";
+ Data = GetVariableDataPtr (Variable.CurrPtr);
+ DataSize = Variable.CurrPtr->DataSize;
+ } else {
+ //
+ // Neither PlatformLang nor Lang is set, directly return
+ //
+ return;
+ }
+ }
+ }
+
+ //
+ // According to UEFI spec, "Lang" and "PlatformLang" is NV|BS|RT attributions.
+ //
+ Attributes = EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS;
+
+ if (StrCmp (VariableName, L"PlatformLang") == 0) {
+ //
+ // Update Lang when PlatformLangCodes/LangCodes were set.
+ //
+ if ((mVariableModuleGlobal->PlatformLangCodes != NULL) && (mVariableModuleGlobal->LangCodes != NULL)) {
+ //
+ // When setting PlatformLang, firstly get most matched language string from supported language codes.
+ //
+ BestPlatformLang = VariableGetBestLanguage (mVariableModuleGlobal->PlatformLangCodes, FALSE, Data, NULL);
+ if (BestPlatformLang != NULL) {
+ //
+ // Get the corresponding index in language codes.
+ //
+ Index = GetIndexFromSupportedLangCodes (mVariableModuleGlobal->PlatformLangCodes, BestPlatformLang, FALSE);
+
+ //
+ // Get the corresponding ISO639 language tag according to RFC4646 language tag.
+ //
+ BestLang = GetLangFromSupportedLangCodes (mVariableModuleGlobal->LangCodes, Index, TRUE);
+
+ //
+ // Successfully convert PlatformLang to Lang, and set the BestLang value into Lang variable simultaneously.
+ //
+ FindVariable (L"Lang", &gEfiGlobalVariableGuid, &Variable, (VARIABLE_GLOBAL *)mVariableModuleGlobal);
+
+ Status = UpdateVariable (L"Lang", &gEfiGlobalVariableGuid, BestLang,
+ ISO_639_2_ENTRY_SIZE + 1, Attributes, 0, 0, &Variable, NULL);
+
+ DEBUG ((EFI_D_INFO, "Variable Driver Auto Update PlatformLang, PlatformLang:%a, Lang:%a\n", BestPlatformLang, BestLang));
+
+ ASSERT_EFI_ERROR(Status);
+ }
+ }
+
+ } else if (StrCmp (VariableName, L"Lang") == 0) {
+ //
+ // Update PlatformLang when PlatformLangCodes/LangCodes were set.
+ //
+ if ((mVariableModuleGlobal->PlatformLangCodes != NULL) && (mVariableModuleGlobal->LangCodes != NULL)) {
+ //
+ // When setting Lang, firstly get most matched language string from supported language codes.
+ //
+ BestLang = VariableGetBestLanguage (mVariableModuleGlobal->LangCodes, TRUE, Data, NULL);
+ if (BestLang != NULL) {
+ //
+ // Get the corresponding index in language codes.
+ //
+ Index = GetIndexFromSupportedLangCodes (mVariableModuleGlobal->LangCodes, BestLang, TRUE);
+
+ //
+ // Get the corresponding RFC4646 language tag according to ISO639 language tag.
+ //
+ BestPlatformLang = GetLangFromSupportedLangCodes (mVariableModuleGlobal->PlatformLangCodes, Index, FALSE);
+
+ //
+ // Successfully convert Lang to PlatformLang, and set the BestPlatformLang value into PlatformLang variable simultaneously.
+ //
+ FindVariable (L"PlatformLang", &gEfiGlobalVariableGuid, &Variable, (VARIABLE_GLOBAL *)mVariableModuleGlobal);
+
+ Status = UpdateVariable (L"PlatformLang", &gEfiGlobalVariableGuid, BestPlatformLang,
+ AsciiStrSize (BestPlatformLang), Attributes, 0, 0, &Variable, NULL);
+
+ DEBUG ((EFI_D_INFO, "Variable Driver Auto Update Lang, Lang:%a, PlatformLang:%a\n", BestLang, BestPlatformLang));
+ ASSERT_EFI_ERROR (Status);
+ }
+ }
+ }
+}
+
+/**
+ Update the variable region with Variable information. If EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS is set,
+ index of associated public key is needed.
+
+ @param[in] VariableName Name of variable.
+ @param[in] VendorGuid Guid of variable.
+ @param[in] Data Variable data.
+ @param[in] DataSize Size of data. 0 means delete.
+ @param[in] Attributes Attributes of the variable.
+ @param[in] KeyIndex Index of associated public key.
+ @param[in] MonotonicCount Value of associated monotonic count.
+ @param[in] CacheVariable The variable information which is used to keep track of variable usage.
+ @param[in] TimeStamp Value of associated TimeStamp.
+
+ @retval EFI_SUCCESS The update operation is success.
+ @retval EFI_OUT_OF_RESOURCES Variable region is full, can not write other data into this region.
+
+**/
+EFI_STATUS
+UpdateVariable (
+ IN CHAR16 *VariableName,
+ IN EFI_GUID *VendorGuid,
+ IN VOID *Data,
+ IN UINTN DataSize,
+ IN UINT32 Attributes OPTIONAL,
+ IN UINT32 KeyIndex OPTIONAL,
+ IN UINT64 MonotonicCount OPTIONAL,
+ IN VARIABLE_POINTER_TRACK *CacheVariable,
+ IN EFI_TIME *TimeStamp OPTIONAL
+ )
+{
+ EFI_STATUS Status;
+ VARIABLE_HEADER *NextVariable;
+ UINTN ScratchSize;
+ UINTN ScratchDataSize;
+ UINTN NonVolatileVarableStoreSize;
+ UINTN VarNameOffset;
+ UINTN VarDataOffset;
+ UINTN VarNameSize;
+ UINTN VarSize;
+ BOOLEAN Volatile;
+ EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL *Fvb;
+ UINT8 State;
+ BOOLEAN Reclaimed;
+ VARIABLE_POINTER_TRACK *Variable;
+ VARIABLE_POINTER_TRACK NvVariable;
+ VARIABLE_STORE_HEADER *VariableStoreHeader;
+ UINTN CacheOffset;
+ UINTN BufSize;
+ UINTN DataOffset;
+ UINTN RevBufSize;
+
+ if (mVariableModuleGlobal->FvbInstance == NULL) {
+ //
+ // The FVB protocol is not installed, so the EFI_VARIABLE_WRITE_ARCH_PROTOCOL is not installed.
+ //
+ if ((Attributes & EFI_VARIABLE_NON_VOLATILE) != 0) {
+ //
+ // Trying to update NV variable prior to the installation of EFI_VARIABLE_WRITE_ARCH_PROTOCOL
+ //
+ return EFI_NOT_AVAILABLE_YET;
+ } else if ((Attributes & EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS) != 0) {
+ //
+ // Trying to update volatile authenticated variable prior to the installation of EFI_VARIABLE_WRITE_ARCH_PROTOCOL
+ // The authenticated variable perhaps is not initialized, just return here.
+ //
+ return EFI_NOT_AVAILABLE_YET;
+ }
+ }
+
+ if ((CacheVariable->CurrPtr == NULL) || CacheVariable->Volatile) {
+ Variable = CacheVariable;
+ } else {
+ //
+ // Update/Delete existing NV variable.
+ // CacheVariable points to the variable in the memory copy of Flash area
+ // Now let Variable points to the same variable in Flash area.
+ //
+ VariableStoreHeader = (VARIABLE_STORE_HEADER *) ((UINTN) mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase);
+ Variable = &NvVariable;
+ Variable->StartPtr = GetStartPointer (VariableStoreHeader);
+ Variable->EndPtr = GetEndPointer (VariableStoreHeader);
+ Variable->CurrPtr = (VARIABLE_HEADER *)((UINTN)Variable->StartPtr + ((UINTN)CacheVariable->CurrPtr - (UINTN)CacheVariable->StartPtr));
+ Variable->Volatile = FALSE;
+ }
+
+ Fvb = mVariableModuleGlobal->FvbInstance;
+ Reclaimed = FALSE;
+
+ //
+ // Tricky part: Use scratch data area at the end of volatile variable store
+ // as a temporary storage.
+ //
+ NextVariable = GetEndPointer ((VARIABLE_STORE_HEADER *) ((UINTN) mVariableModuleGlobal->VariableGlobal.VolatileVariableBase));
+ ScratchSize = MAX (PcdGet32 (PcdMaxVariableSize), PcdGet32 (PcdMaxHardwareErrorVariableSize));
+ ScratchDataSize = ScratchSize - sizeof (VARIABLE_HEADER) - StrSize (VariableName) - GET_PAD_SIZE (StrSize (VariableName));
+
+ if (Variable->CurrPtr != NULL) {
+ //
+ // Update/Delete existing variable.
+ //
+ if (AtRuntime ()) {
+ //
+ // If AtRuntime and the variable is Volatile and Runtime Access,
+ // the volatile is ReadOnly, and SetVariable should be aborted and
+ // return EFI_WRITE_PROTECTED.
+ //
+ if (Variable->Volatile) {
+ Status = EFI_WRITE_PROTECTED;
+ goto Done;
+ }
+ //
+ // Only variable that have NV attributes can be updated/deleted in Runtime.
+ //
+ if ((Variable->CurrPtr->Attributes & EFI_VARIABLE_NON_VOLATILE) == 0) {
+ Status = EFI_INVALID_PARAMETER;
+ goto Done;
+ }
+ }
+
+ //
+ // Setting a data variable with no access, or zero DataSize attributes
+ // causes it to be deleted.
+ // When the EFI_VARIABLE_APPEND_WRITE attribute is set, DataSize of zero will
+ // not delete the variable.
+ //
+ if ((((Attributes & EFI_VARIABLE_APPEND_WRITE) == 0) && (DataSize == 0))|| ((Attributes & (EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_BOOTSERVICE_ACCESS)) == 0)) {
+ State = Variable->CurrPtr->State;
+ State &= VAR_DELETED;
+
+ Status = UpdateVariableStore (
+ &mVariableModuleGlobal->VariableGlobal,
+ Variable->Volatile,
+ FALSE,
+ Fvb,
+ (UINTN) &Variable->CurrPtr->State,
+ sizeof (UINT8),
+ &State
+ );
+ if (!EFI_ERROR (Status)) {
+ UpdateVariableInfo (VariableName, VendorGuid, Variable->Volatile, FALSE, FALSE, TRUE, FALSE);
+ if (!Variable->Volatile) {
+ CacheVariable->CurrPtr->State = State;
+ }
+ }
+ goto Done;
+ }
+ //
+ // If the variable is marked valid, and the same data has been passed in,
+ // then return to the caller immediately.
+ //
+ if (DataSizeOfVariable (Variable->CurrPtr) == DataSize &&
+ (CompareMem (Data, GetVariableDataPtr (Variable->CurrPtr), DataSize) == 0) &&
+ ((Attributes & EFI_VARIABLE_APPEND_WRITE) == 0)) {
+
+ UpdateVariableInfo (VariableName, VendorGuid, Variable->Volatile, FALSE, TRUE, FALSE, FALSE);
+ Status = EFI_SUCCESS;
+ goto Done;
+ } else if ((Variable->CurrPtr->State == VAR_ADDED) ||
+ (Variable->CurrPtr->State == (VAR_ADDED & VAR_IN_DELETED_TRANSITION))) {
+
+ //
+ // EFI_VARIABLE_APPEND_WRITE attribute only effects for existing variable
+ //
+ if ((Attributes & EFI_VARIABLE_APPEND_WRITE) != 0) {
+
+ BufSize = Variable->CurrPtr->DataSize + DataSize;
+ RevBufSize = MIN (PcdGet32 (PcdMaxAppendVariableSize), ScratchDataSize);
+
+ if (BufSize > RevBufSize) {
+ //
+ // If variable size (previous + current) is bigger than reserved buffer in runtime,
+ // return EFI_OUT_OF_RESOURCES.
+ //
+ return EFI_OUT_OF_RESOURCES;
+ }
+
+ SetMem (mStorageArea, PcdGet32 (PcdMaxAppendVariableSize), 0xff);
+ //
+ // Cache the previous variable data into StorageArea.
+ //
+ DataOffset = sizeof (VARIABLE_HEADER) + Variable->CurrPtr->NameSize + GET_PAD_SIZE (Variable->CurrPtr->NameSize);
+ CopyMem (mStorageArea, (UINT8*)((UINTN)Variable->CurrPtr + DataOffset), Variable->CurrPtr->DataSize);
+
+ //
+ // Append the new data to the end of previous data.
+ //
+ CopyMem ((UINT8*)((UINTN)mStorageArea + Variable->CurrPtr->DataSize), Data, DataSize);
+
+ //
+ // Override Data and DataSize which are used for combined data area including previous and new data.
+ //
+ Data = mStorageArea;
+ DataSize = BufSize;
+ }
+
+ //
+ // Mark the old variable as in delete transition.
+ //
+ State = Variable->CurrPtr->State;
+ State &= VAR_IN_DELETED_TRANSITION;
+
+ Status = UpdateVariableStore (
+ &mVariableModuleGlobal->VariableGlobal,
+ Variable->Volatile,
+ FALSE,
+ Fvb,
+ (UINTN) &Variable->CurrPtr->State,
+ sizeof (UINT8),
+ &State
+ );
+ if (EFI_ERROR (Status)) {
+ goto Done;
+ }
+ if (!Variable->Volatile) {
+ CacheVariable->CurrPtr->State = State;
+ }
+ }
+ } else {
+ //
+ // Not found existing variable. Create a new variable.
+ //
+
+ //
+ // EFI_VARIABLE_APPEND_WRITE attribute only set for existing variable
+ //
+ if ((Attributes & EFI_VARIABLE_APPEND_WRITE) != 0) {
+ Status = EFI_INVALID_PARAMETER;
+ goto Done;
+ }
+
+ //
+ // Make sure we are trying to create a new variable.
+ // Setting a data variable with zero DataSize or no access attributes means to delete it.
+ //
+ if (DataSize == 0 || (Attributes & (EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_BOOTSERVICE_ACCESS)) == 0) {
+ Status = EFI_NOT_FOUND;
+ goto Done;
+ }
+
+ //
+ // Only variable have NV|RT attribute can be created in Runtime.
+ //
+ if (AtRuntime () &&
+ (((Attributes & EFI_VARIABLE_RUNTIME_ACCESS) == 0) || ((Attributes & EFI_VARIABLE_NON_VOLATILE) == 0))) {
+ Status = EFI_INVALID_PARAMETER;
+ goto Done;
+ }
+ }
+
+ //
+ // Function part - create a new variable and copy the data.
+ // Both update a variable and create a variable will come here.
+
+ SetMem (NextVariable, ScratchSize, 0xff);
+
+ NextVariable->StartId = VARIABLE_DATA;
+ //
+ // NextVariable->State = VAR_ADDED;
+ //
+ NextVariable->Reserved = 0;
+ NextVariable->PubKeyIndex = KeyIndex;
+ NextVariable->MonotonicCount = MonotonicCount;
+ SetMem (&NextVariable->TimeStamp, sizeof (EFI_TIME), 0);
+
+ if (((Attributes & EFI_VARIABLE_APPEND_WRITE) == 0) &&
+ ((Attributes & EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS) != 0)) {
+ CopyMem (&NextVariable->TimeStamp, TimeStamp, sizeof (EFI_TIME));
+ } else if (
+ ((Attributes & EFI_VARIABLE_APPEND_WRITE) != 0) &&
+ ((Attributes & EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS) != 0)) {
+ //
+ // In the case when the EFI_VARIABLE_APPEND_WRITE attribute is set, only
+ // when the new TimeStamp value is later than the current timestamp associated
+ // with the variable, we need associate the new timestamp with the updated value.
+ //
+ if (CompareTimeStamp (&Variable->CurrPtr->TimeStamp, TimeStamp)) {
+ CopyMem (&NextVariable->TimeStamp, TimeStamp, sizeof (EFI_TIME));
+ }
+ }
+
+ //
+ // The EFI_VARIABLE_APPEND_WRITE attribute will never be set in the returned
+ // Attributes bitmask parameter of a GetVariable() call.
+ //
+ NextVariable->Attributes = Attributes & (~EFI_VARIABLE_APPEND_WRITE);
+
+ VarNameOffset = sizeof (VARIABLE_HEADER);
+ VarNameSize = StrSize (VariableName);
+ CopyMem (
+ (UINT8 *) ((UINTN) NextVariable + VarNameOffset),
+ VariableName,
+ VarNameSize
+ );
+ VarDataOffset = VarNameOffset + VarNameSize + GET_PAD_SIZE (VarNameSize);
+ CopyMem (
+ (UINT8 *) ((UINTN) NextVariable + VarDataOffset),
+ Data,
+ DataSize
+ );
+ CopyMem (&NextVariable->VendorGuid, VendorGuid, sizeof (EFI_GUID));
+ //
+ // There will be pad bytes after Data, the NextVariable->NameSize and
+ // NextVariable->DataSize should not include pad size so that variable
+ // service can get actual size in GetVariable.
+ //
+ NextVariable->NameSize = (UINT32)VarNameSize;
+ NextVariable->DataSize = (UINT32)DataSize;
+
+ //
+ // The actual size of the variable that stores in storage should
+ // include pad size.
+ //
+ VarSize = VarDataOffset + DataSize + GET_PAD_SIZE (DataSize);
+ if ((Attributes & EFI_VARIABLE_NON_VOLATILE) != 0) {
+ //
+ // Create a nonvolatile variable.
+ //
+ Volatile = FALSE;
+ NonVolatileVarableStoreSize = ((VARIABLE_STORE_HEADER *)(UINTN)(mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase))->Size;
+ if ((((Attributes & EFI_VARIABLE_HARDWARE_ERROR_RECORD) != 0)
+ && ((VarSize + mVariableModuleGlobal->HwErrVariableTotalSize) > PcdGet32 (PcdHwErrStorageSize)))
+ || (((Attributes & EFI_VARIABLE_HARDWARE_ERROR_RECORD) == 0)
+ && ((VarSize + mVariableModuleGlobal->CommonVariableTotalSize) > NonVolatileVarableStoreSize - sizeof (VARIABLE_STORE_HEADER) - PcdGet32 (PcdHwErrStorageSize)))) {
+ if (AtRuntime ()) {
+ Status = EFI_OUT_OF_RESOURCES;
+ goto Done;
+ }
+ //
+ // Perform garbage collection & reclaim operation.
+ //
+ Status = Reclaim (mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase,
+ &mVariableModuleGlobal->NonVolatileLastVariableOffset, FALSE, Variable->CurrPtr);
+ if (EFI_ERROR (Status)) {
+ goto Done;
+ }
+ //
+ // If still no enough space, return out of resources.
+ //
+ if ((((Attributes & EFI_VARIABLE_HARDWARE_ERROR_RECORD) != 0)
+ && ((VarSize + mVariableModuleGlobal->HwErrVariableTotalSize) > PcdGet32 (PcdHwErrStorageSize)))
+ || (((Attributes & EFI_VARIABLE_HARDWARE_ERROR_RECORD) == 0)
+ && ((VarSize + mVariableModuleGlobal->CommonVariableTotalSize) > NonVolatileVarableStoreSize - sizeof (VARIABLE_STORE_HEADER) - PcdGet32 (PcdHwErrStorageSize)))) {
+ Status = EFI_OUT_OF_RESOURCES;
+ goto Done;
+ }
+ Reclaimed = TRUE;
+ }
+ //
+ // Four steps
+ // 1. Write variable header
+ // 2. Set variable state to header valid
+ // 3. Write variable data
+ // 4. Set variable state to valid
+ //
+ //
+ // Step 1:
+ //
+ CacheOffset = mVariableModuleGlobal->NonVolatileLastVariableOffset;
+ Status = UpdateVariableStore (
+ &mVariableModuleGlobal->VariableGlobal,
+ FALSE,
+ TRUE,
+ Fvb,
+ mVariableModuleGlobal->NonVolatileLastVariableOffset,
+ sizeof (VARIABLE_HEADER),
+ (UINT8 *) NextVariable
+ );
+
+ if (EFI_ERROR (Status)) {
+ goto Done;
+ }
+
+ //
+ // Step 2:
+ //
+ NextVariable->State = VAR_HEADER_VALID_ONLY;
+ Status = UpdateVariableStore (
+ &mVariableModuleGlobal->VariableGlobal,
+ FALSE,
+ TRUE,
+ Fvb,
+ mVariableModuleGlobal->NonVolatileLastVariableOffset + OFFSET_OF (VARIABLE_HEADER, State),
+ sizeof (UINT8),
+ &NextVariable->State
+ );
+
+ if (EFI_ERROR (Status)) {
+ goto Done;
+ }
+ //
+ // Step 3:
+ //
+ Status = UpdateVariableStore (
+ &mVariableModuleGlobal->VariableGlobal,
+ FALSE,
+ TRUE,
+ Fvb,
+ mVariableModuleGlobal->NonVolatileLastVariableOffset + sizeof (VARIABLE_HEADER),
+ (UINT32) VarSize - sizeof (VARIABLE_HEADER),
+ (UINT8 *) NextVariable + sizeof (VARIABLE_HEADER)
+ );
+
+ if (EFI_ERROR (Status)) {
+ goto Done;
+ }
+ //
+ // Step 4:
+ //
+ NextVariable->State = VAR_ADDED;
+ Status = UpdateVariableStore (
+ &mVariableModuleGlobal->VariableGlobal,
+ FALSE,
+ TRUE,
+ Fvb,
+ mVariableModuleGlobal->NonVolatileLastVariableOffset + OFFSET_OF (VARIABLE_HEADER, State),
+ sizeof (UINT8),
+ &NextVariable->State
+ );
+
+ if (EFI_ERROR (Status)) {
+ goto Done;
+ }
+
+ mVariableModuleGlobal->NonVolatileLastVariableOffset += HEADER_ALIGN (VarSize);
+
+ if ((Attributes & EFI_VARIABLE_HARDWARE_ERROR_RECORD) != 0) {
+ mVariableModuleGlobal->HwErrVariableTotalSize += HEADER_ALIGN (VarSize);
+ } else {
+ mVariableModuleGlobal->CommonVariableTotalSize += HEADER_ALIGN (VarSize);
+ }
+ //
+ // update the memory copy of Flash region.
+ //
+ CopyMem ((UINT8 *)mNvVariableCache + CacheOffset, (UINT8 *)NextVariable, VarSize);
+ } else {
+ //
+ // Create a volatile variable.
+ //
+ Volatile = TRUE;
+
+ if ((UINT32) (VarSize + mVariableModuleGlobal->VolatileLastVariableOffset) >
+ ((VARIABLE_STORE_HEADER *) ((UINTN) (mVariableModuleGlobal->VariableGlobal.VolatileVariableBase)))->Size) {
+ //
+ // Perform garbage collection & reclaim operation.
+ //
+ Status = Reclaim (mVariableModuleGlobal->VariableGlobal.VolatileVariableBase,
+ &mVariableModuleGlobal->VolatileLastVariableOffset, TRUE, Variable->CurrPtr);
+ if (EFI_ERROR (Status)) {
+ goto Done;
+ }
+ //
+ // If still no enough space, return out of resources.
+ //
+ if ((UINT32) (VarSize + mVariableModuleGlobal->VolatileLastVariableOffset) >
+ ((VARIABLE_STORE_HEADER *) ((UINTN) (mVariableModuleGlobal->VariableGlobal.VolatileVariableBase)))->Size
+ ) {
+ Status = EFI_OUT_OF_RESOURCES;
+ goto Done;
+ }
+ Reclaimed = TRUE;
+ }
+
+ NextVariable->State = VAR_ADDED;
+ Status = UpdateVariableStore (
+ &mVariableModuleGlobal->VariableGlobal,
+ TRUE,
+ TRUE,
+ Fvb,
+ mVariableModuleGlobal->VolatileLastVariableOffset,
+ (UINT32) VarSize,
+ (UINT8 *) NextVariable
+ );
+
+ if (EFI_ERROR (Status)) {
+ goto Done;
+ }
+
+ mVariableModuleGlobal->VolatileLastVariableOffset += HEADER_ALIGN (VarSize);
+ }
+
+ //
+ // Mark the old variable as deleted.
+ //
+ if (!Reclaimed && !EFI_ERROR (Status) && Variable->CurrPtr != NULL) {
+ State = Variable->CurrPtr->State;
+ State &= VAR_DELETED;
+
+ Status = UpdateVariableStore (
+ &mVariableModuleGlobal->VariableGlobal,
+ Variable->Volatile,
+ FALSE,
+ Fvb,
+ (UINTN) &Variable->CurrPtr->State,
+ sizeof (UINT8),
+ &State
+ );
+ if (!EFI_ERROR (Status) && !Variable->Volatile) {
+ CacheVariable->CurrPtr->State = State;
+ }
+ }
+
+ if (!EFI_ERROR (Status)) {
+ UpdateVariableInfo (VariableName, VendorGuid, Volatile, FALSE, TRUE, FALSE, FALSE);
+ }
+
+Done:
+ return Status;
+}
+
+/**
+
+ This code finds variable in storage blocks (Volatile or Non-Volatile).
+
+ @param VariableName Name of Variable to be found.
+ @param VendorGuid Variable vendor GUID.
+ @param Attributes Attribute value of the variable found.
+ @param DataSize Size of Data found. If size is less than the
+ data, this value contains the required size.
+ @param Data Data pointer.
+
+ @return EFI_INVALID_PARAMETER Invalid parameter.
+ @return EFI_SUCCESS Find the specified variable.
+ @return EFI_NOT_FOUND Not found.
+ @return EFI_BUFFER_TO_SMALL DataSize is too small for the result.
+
+**/
+EFI_STATUS
+EFIAPI
+VariableServiceGetVariable (
+ IN CHAR16 *VariableName,
+ IN EFI_GUID *VendorGuid,
+ OUT UINT32 *Attributes OPTIONAL,
+ IN OUT UINTN *DataSize,
+ OUT VOID *Data
+ )
+{
+ EFI_STATUS Status;
+ VARIABLE_POINTER_TRACK Variable;
+ UINTN VarDataSize;
+
+ if (VariableName == NULL || VendorGuid == NULL || DataSize == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ AcquireLockOnlyAtBootTime(&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);
+
+ Status = FindVariable (VariableName, VendorGuid, &Variable, &mVariableModuleGlobal->VariableGlobal);
+ if (Variable.CurrPtr == NULL || EFI_ERROR (Status)) {
+ goto Done;
+ }
+
+ //
+ // Get data size
+ //
+ VarDataSize = DataSizeOfVariable (Variable.CurrPtr);
+ ASSERT (VarDataSize != 0);
+
+ if (*DataSize >= VarDataSize) {
+ if (Data == NULL) {
+ Status = EFI_INVALID_PARAMETER;
+ goto Done;
+ }
+
+ CopyMem (Data, GetVariableDataPtr (Variable.CurrPtr), VarDataSize);
+ if (Attributes != NULL) {
+ *Attributes = Variable.CurrPtr->Attributes;
+ }
+
+ *DataSize = VarDataSize;
+ UpdateVariableInfo (VariableName, VendorGuid, Variable.Volatile, TRUE, FALSE, FALSE, FALSE);
+
+ Status = EFI_SUCCESS;
+ goto Done;
+ } else {
+ *DataSize = VarDataSize;
+ Status = EFI_BUFFER_TOO_SMALL;
+ goto Done;
+ }
+
+Done:
+ ReleaseLockOnlyAtBootTime (&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);
+ return Status;
+}
+
+
+
+/**
+
+ This code Finds the Next available variable.
+
+ @param VariableNameSize Size of the variable name.
+ @param VariableName Pointer to variable name.
+ @param VendorGuid Variable Vendor Guid.
+
+ @return EFI_INVALID_PARAMETER Invalid parameter.
+ @return EFI_SUCCESS Find the specified variable.
+ @return EFI_NOT_FOUND Not found.
+ @return EFI_BUFFER_TO_SMALL DataSize is too small for the result.
+
+**/
+EFI_STATUS
+EFIAPI
+VariableServiceGetNextVariableName (
+ IN OUT UINTN *VariableNameSize,
+ IN OUT CHAR16 *VariableName,
+ IN OUT EFI_GUID *VendorGuid
+ )
+{
+ VARIABLE_POINTER_TRACK Variable;
+ UINTN VarNameSize;
+ EFI_STATUS Status;
+
+ if (VariableNameSize == NULL || VariableName == NULL || VendorGuid == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ AcquireLockOnlyAtBootTime(&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);
+
+ Status = FindVariable (VariableName, VendorGuid, &Variable, &mVariableModuleGlobal->VariableGlobal);
+ if (Variable.CurrPtr == NULL || EFI_ERROR (Status)) {
+ goto Done;
+ }
+
+ if (VariableName[0] != 0) {
+ //
+ // If variable name is not NULL, get next variable.
+ //
+ Variable.CurrPtr = GetNextVariablePtr (Variable.CurrPtr);
+ }
+
+ while (TRUE) {
+ //
+ // If both volatile and non-volatile variable store are parsed,
+ // return not found.
+ //
+ if (Variable.CurrPtr >= Variable.EndPtr || Variable.CurrPtr == NULL) {
+ Variable.Volatile = (BOOLEAN) (Variable.Volatile ^ ((BOOLEAN) 0x1));
+ if (!Variable.Volatile) {
+ Variable.StartPtr = GetStartPointer ((VARIABLE_STORE_HEADER *) (UINTN) mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase);
+ Variable.EndPtr = GetEndPointer ((VARIABLE_STORE_HEADER *) ((UINTN) mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase));
+ } else {
+ Status = EFI_NOT_FOUND;
+ goto Done;
+ }
+
+ Variable.CurrPtr = Variable.StartPtr;
+ if (!IsValidVariableHeader (Variable.CurrPtr)) {
+ continue;
+ }
+ }
+ //
+ // Variable is found
+ //
+ if (IsValidVariableHeader (Variable.CurrPtr) && Variable.CurrPtr->State == VAR_ADDED) {
+ if ((AtRuntime () && ((Variable.CurrPtr->Attributes & EFI_VARIABLE_RUNTIME_ACCESS) == 0)) == 0) {
+ VarNameSize = NameSizeOfVariable (Variable.CurrPtr);
+ ASSERT (VarNameSize != 0);
+
+ if (VarNameSize <= *VariableNameSize) {
+ CopyMem (
+ VariableName,
+ GetVariableNamePtr (Variable.CurrPtr),
+ VarNameSize
+ );
+ CopyMem (
+ VendorGuid,
+ &Variable.CurrPtr->VendorGuid,
+ sizeof (EFI_GUID)
+ );
+ Status = EFI_SUCCESS;
+ } else {
+ Status = EFI_BUFFER_TOO_SMALL;
+ }
+
+ *VariableNameSize = VarNameSize;
+ goto Done;
+ }
+ }
+
+ Variable.CurrPtr = GetNextVariablePtr (Variable.CurrPtr);
+ }
+
+Done:
+ ReleaseLockOnlyAtBootTime (&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);
+ return Status;
+}
+
+/**
+
+ This code sets variable in storage blocks (Volatile or Non-Volatile).
+
+ @param VariableName Name of Variable to be found.
+ @param VendorGuid Variable vendor GUID.
+ @param Attributes Attribute value of the variable found
+ @param DataSize Size of Data found. If size is less than the
+ data, this value contains the required size.
+ @param Data Data pointer.
+
+ @return EFI_INVALID_PARAMETER Invalid parameter.
+ @return EFI_SUCCESS Set successfully.
+ @return EFI_OUT_OF_RESOURCES Resource not enough to set variable.
+ @return EFI_NOT_FOUND Not found.
+ @return EFI_WRITE_PROTECTED Variable is read-only.
+
+**/
+EFI_STATUS
+EFIAPI
+VariableServiceSetVariable (
+ IN CHAR16 *VariableName,
+ IN EFI_GUID *VendorGuid,
+ IN UINT32 Attributes,
+ IN UINTN DataSize,
+ IN VOID *Data
+ )
+{
+ VARIABLE_POINTER_TRACK Variable;
+ EFI_STATUS Status;
+ VARIABLE_HEADER *NextVariable;
+ EFI_PHYSICAL_ADDRESS Point;
+ UINTN PayloadSize;
+
+ //
+ // Check input parameters.
+ //
+ if (VariableName == NULL || VariableName[0] == 0 || VendorGuid == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if (DataSize != 0 && Data == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ //
+ // Make sure if runtime bit is set, boot service bit is set also.
+ //
+ if ((Attributes & (EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_BOOTSERVICE_ACCESS)) == EFI_VARIABLE_RUNTIME_ACCESS) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ //
+ // EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS and EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS attribute
+ // cannot be set both.
+ //
+ if (((Attributes & EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS) == EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS) \
+ && ((Attributes & EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS) == EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS)) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if ((Attributes & EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS) == EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS) {
+ if (DataSize < AUTHINFO_SIZE) {
+ //
+ // Try to write Authencated Variable without AuthInfo.
+ //
+ return EFI_SECURITY_VIOLATION;
+ }
+ PayloadSize = DataSize - AUTHINFO_SIZE;
+ } else {
+ PayloadSize = DataSize;
+ }
+ //
+ // The size of the VariableName, including the Unicode Null in bytes plus
+ // the DataSize is limited to maximum size of PcdGet32 (PcdMaxHardwareErrorVariableSize)
+ // bytes for HwErrRec, and PcdGet32 (PcdMaxVariableSize) bytes for the others.
+ //
+ if ((Attributes & EFI_VARIABLE_HARDWARE_ERROR_RECORD) == EFI_VARIABLE_HARDWARE_ERROR_RECORD) {
+ if ((PayloadSize > PcdGet32 (PcdMaxHardwareErrorVariableSize)) ||
+ (sizeof (VARIABLE_HEADER) + StrSize (VariableName) + PayloadSize > PcdGet32 (PcdMaxHardwareErrorVariableSize))) {
+ return EFI_INVALID_PARAMETER;
+ }
+ //
+ // According to UEFI spec, HARDWARE_ERROR_RECORD variable name convention should be L"HwErrRecXXXX".
+ //
+ if (StrnCmp(VariableName, L"HwErrRec", StrLen(L"HwErrRec")) != 0) {
+ return EFI_INVALID_PARAMETER;
+ }
+ } else {
+ //
+ // The size of the VariableName, including the Unicode Null in bytes plus
+ // the DataSize is limited to maximum size of PcdGet32 (PcdMaxVariableSize) bytes.
+ //
+ if ((PayloadSize > PcdGet32 (PcdMaxVariableSize)) ||
+ (sizeof (VARIABLE_HEADER) + StrSize (VariableName) + PayloadSize > PcdGet32 (PcdMaxVariableSize))) {
+ return EFI_INVALID_PARAMETER;
+ }
+ }
+
+ AcquireLockOnlyAtBootTime(&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);
+
+ //
+ // Consider reentrant in MCA/INIT/NMI. It needs be reupdated.
+ //
+ if (1 < InterlockedIncrement (&mVariableModuleGlobal->VariableGlobal.ReentrantState)) {
+ Point = mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase;
+ //
+ // Parse non-volatile variable data and get last variable offset.
+ //
+ NextVariable = GetStartPointer ((VARIABLE_STORE_HEADER *) (UINTN) Point);
+ while ((NextVariable < GetEndPointer ((VARIABLE_STORE_HEADER *) (UINTN) Point))
+ && IsValidVariableHeader (NextVariable)) {
+ NextVariable = GetNextVariablePtr (NextVariable);
+ }
+ mVariableModuleGlobal->NonVolatileLastVariableOffset = (UINTN) NextVariable - (UINTN) Point;
+ }
+
+ //
+ // Check whether the input variable is already existed.
+ //
+ FindVariable (VariableName, VendorGuid, &Variable, &mVariableModuleGlobal->VariableGlobal);
+
+ //
+ // Hook the operation of setting PlatformLangCodes/PlatformLang and LangCodes/Lang.
+ //
+ AutoUpdateLangVariable (VariableName, Data, DataSize);
+ //
+ // Process PK, KEK, Sigdb seperately.
+ //
+ if (CompareGuid (VendorGuid, &gEfiGlobalVariableGuid) && (StrCmp (VariableName, EFI_PLATFORM_KEY_NAME) == 0)){
+ Status = ProcessVarWithPk (VariableName, VendorGuid, Data, DataSize, &Variable, Attributes, TRUE);
+ } else if (CompareGuid (VendorGuid, &gEfiGlobalVariableGuid) && (StrCmp (VariableName, EFI_KEY_EXCHANGE_KEY_NAME) == 0)) {
+ Status = ProcessVarWithPk (VariableName, VendorGuid, Data, DataSize, &Variable, Attributes, FALSE);
+ } else if (CompareGuid (VendorGuid, &gEfiImageSecurityDatabaseGuid) && ((Attributes & EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS) == 0)) {
+ Status = ProcessVarWithKek (VariableName, VendorGuid, Data, DataSize, &Variable, Attributes);
+ } else {
+ Status = ProcessVariable (VariableName, VendorGuid, Data, DataSize, &Variable, Attributes);
+ }
+
+ InterlockedDecrement (&mVariableModuleGlobal->VariableGlobal.ReentrantState);
+ ReleaseLockOnlyAtBootTime (&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);
+
+ return Status;
+}
+
+/**
+
+ This code returns information about the EFI variables.
+
+ @param Attributes Attributes bitmask to specify the type of variables
+ on which to return information.
+ @param MaximumVariableStorageSize Pointer to the maximum size of the storage space available
+ for the EFI variables associated with the attributes specified.
+ @param RemainingVariableStorageSize Pointer to the remaining size of the storage space available
+ for EFI variables associated with the attributes specified.
+ @param MaximumVariableSize Pointer to the maximum size of an individual EFI variables
+ associated with the attributes specified.
+
+ @return EFI_INVALID_PARAMETER An invalid combination of attribute bits was supplied.
+ @return EFI_SUCCESS Query successfully.
+ @return EFI_UNSUPPORTED The attribute is not supported on this platform.
+
+**/
+EFI_STATUS
+EFIAPI
+VariableServiceQueryVariableInfo (
+ IN UINT32 Attributes,
+ OUT UINT64 *MaximumVariableStorageSize,
+ OUT UINT64 *RemainingVariableStorageSize,
+ OUT UINT64 *MaximumVariableSize
+ )
+{
+ VARIABLE_HEADER *Variable;
+ VARIABLE_HEADER *NextVariable;
+ UINT64 VariableSize;
+ VARIABLE_STORE_HEADER *VariableStoreHeader;
+ UINT64 CommonVariableTotalSize;
+ UINT64 HwErrVariableTotalSize;
+
+ CommonVariableTotalSize = 0;
+ HwErrVariableTotalSize = 0;
+
+ if(MaximumVariableStorageSize == NULL || RemainingVariableStorageSize == NULL || MaximumVariableSize == NULL || Attributes == 0) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if((Attributes & (EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_HARDWARE_ERROR_RECORD)) == 0) {
+ //
+ // Make sure the Attributes combination is supported by the platform.
+ //
+ return EFI_UNSUPPORTED;
+ } else if ((Attributes & (EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_BOOTSERVICE_ACCESS)) == EFI_VARIABLE_RUNTIME_ACCESS) {
+ //
+ // Make sure if runtime bit is set, boot service bit is set also.
+ //
+ return EFI_INVALID_PARAMETER;
+ } else if (AtRuntime () && ((Attributes & EFI_VARIABLE_RUNTIME_ACCESS) == 0)) {
+ //
+ // Make sure RT Attribute is set if we are in Runtime phase.
+ //
+ return EFI_INVALID_PARAMETER;
+ } else if ((Attributes & (EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_HARDWARE_ERROR_RECORD)) == EFI_VARIABLE_HARDWARE_ERROR_RECORD) {
+ //
+ // Make sure Hw Attribute is set with NV.
+ //
+ return EFI_INVALID_PARAMETER;
+ }
+
+ AcquireLockOnlyAtBootTime(&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);
+
+ if((Attributes & EFI_VARIABLE_NON_VOLATILE) == 0) {
+ //
+ // Query is Volatile related.
+ //
+ VariableStoreHeader = (VARIABLE_STORE_HEADER *) ((UINTN) mVariableModuleGlobal->VariableGlobal.VolatileVariableBase);
+ } else {
+ //
+ // Query is Non-Volatile related.
+ //
+ VariableStoreHeader = mNvVariableCache;
+ }
+
+ //
+ // Now let's fill *MaximumVariableStorageSize *RemainingVariableStorageSize
+ // with the storage size (excluding the storage header size).
+ //
+ *MaximumVariableStorageSize = VariableStoreHeader->Size - sizeof (VARIABLE_STORE_HEADER);
+
+ //
+ // Harware error record variable needs larger size.
+ //
+ if ((Attributes & (EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_HARDWARE_ERROR_RECORD)) == (EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_HARDWARE_ERROR_RECORD)) {
+ *MaximumVariableStorageSize = PcdGet32 (PcdHwErrStorageSize);
+ *MaximumVariableSize = PcdGet32 (PcdMaxHardwareErrorVariableSize) - sizeof (VARIABLE_HEADER);
+ } else {
+ if ((Attributes & EFI_VARIABLE_NON_VOLATILE) != 0) {
+ ASSERT (PcdGet32 (PcdHwErrStorageSize) < VariableStoreHeader->Size);
+ *MaximumVariableStorageSize = VariableStoreHeader->Size - sizeof (VARIABLE_STORE_HEADER) - PcdGet32 (PcdHwErrStorageSize);
+ }
+
+ //
+ // Let *MaximumVariableSize be PcdGet32 (PcdMaxVariableSize) with the exception of the variable header size.
+ //
+ *MaximumVariableSize = PcdGet32 (PcdMaxVariableSize) - sizeof (VARIABLE_HEADER);
+ }
+
+ //
+ // Point to the starting address of the variables.
+ //
+ Variable = GetStartPointer (VariableStoreHeader);
+
+ //
+ // Now walk through the related variable store.
+ //
+ while ((Variable < GetEndPointer (VariableStoreHeader)) && IsValidVariableHeader (Variable)) {
+ NextVariable = GetNextVariablePtr (Variable);
+ VariableSize = (UINT64) (UINTN) NextVariable - (UINT64) (UINTN) Variable;
+
+ if (AtRuntime ()) {
+ //
+ // We don't take the state of the variables in mind
+ // when calculating RemainingVariableStorageSize,
+ // since the space occupied by variables not marked with
+ // VAR_ADDED is not allowed to be reclaimed in Runtime.
+ //
+ if ((Variable->Attributes & EFI_VARIABLE_HARDWARE_ERROR_RECORD) == EFI_VARIABLE_HARDWARE_ERROR_RECORD) {
+ HwErrVariableTotalSize += VariableSize;
+ } else {
+ CommonVariableTotalSize += VariableSize;
+ }
+ } else {
+ //
+ // Only care about Variables with State VAR_ADDED, because
+ // the space not marked as VAR_ADDED is reclaimable now.
+ //
+ if (Variable->State == VAR_ADDED) {
+ if ((Variable->Attributes & EFI_VARIABLE_HARDWARE_ERROR_RECORD) == EFI_VARIABLE_HARDWARE_ERROR_RECORD) {
+ HwErrVariableTotalSize += VariableSize;
+ } else {
+ CommonVariableTotalSize += VariableSize;
+ }
+ }
+ }
+
+ //
+ // Go to the next one.
+ //
+ Variable = NextVariable;
+ }
+
+ if ((Attributes & EFI_VARIABLE_HARDWARE_ERROR_RECORD) == EFI_VARIABLE_HARDWARE_ERROR_RECORD){
+ *RemainingVariableStorageSize = *MaximumVariableStorageSize - HwErrVariableTotalSize;
+ }else {
+ *RemainingVariableStorageSize = *MaximumVariableStorageSize - CommonVariableTotalSize;
+ }
+
+ if (*RemainingVariableStorageSize < sizeof (VARIABLE_HEADER)) {
+ *MaximumVariableSize = 0;
+ } else if ((*RemainingVariableStorageSize - sizeof (VARIABLE_HEADER)) < *MaximumVariableSize) {
+ *MaximumVariableSize = *RemainingVariableStorageSize - sizeof (VARIABLE_HEADER);
+ }
+
+ ReleaseLockOnlyAtBootTime (&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);
+ return EFI_SUCCESS;
+}
+
+
+/**
+ This function reclaims variable storage if free size is below the threshold.
+
+**/
+VOID
+ReclaimForOS(
+ VOID
+ )
+{
+ EFI_STATUS Status;
+ UINTN CommonVariableSpace;
+ UINTN RemainingCommonVariableSpace;
+ UINTN RemainingHwErrVariableSpace;
+
+ Status = EFI_SUCCESS;
+
+ CommonVariableSpace = ((VARIABLE_STORE_HEADER *) ((UINTN) (mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase)))->Size - sizeof (VARIABLE_STORE_HEADER) - PcdGet32(PcdHwErrStorageSize); //Allowable max size of common variable storage space
+
+ RemainingCommonVariableSpace = CommonVariableSpace - mVariableModuleGlobal->CommonVariableTotalSize;
+
+ RemainingHwErrVariableSpace = PcdGet32 (PcdHwErrStorageSize) - mVariableModuleGlobal->HwErrVariableTotalSize;
+ //
+ // Check if the free area is blow a threshold.
+ //
+ if ((RemainingCommonVariableSpace < PcdGet32 (PcdMaxVariableSize))
+ || ((PcdGet32 (PcdHwErrStorageSize) != 0) &&
+ (RemainingHwErrVariableSpace < PcdGet32 (PcdMaxHardwareErrorVariableSize)))){
+ Status = Reclaim (
+ mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase,
+ &mVariableModuleGlobal->NonVolatileLastVariableOffset,
+ FALSE,
+ NULL
+ );
+ ASSERT_EFI_ERROR (Status);
+ }
+}
+
+
+/**
+ Initializes variable write service after FVB was ready.
+
+ @retval EFI_SUCCESS Function successfully executed.
+ @retval Others Fail to initialize the variable service.
+
+**/
+EFI_STATUS
+VariableWriteServiceInitialize (
+ VOID
+ )
+{
+ EFI_STATUS Status;
+ VARIABLE_STORE_HEADER *VariableStoreHeader;
+ UINTN Index;
+ UINT8 Data;
+ EFI_PHYSICAL_ADDRESS VariableStoreBase;
+ UINT64 VariableStoreLength;
+
+ VariableStoreBase = mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase;
+ VariableStoreHeader = (VARIABLE_STORE_HEADER *)(UINTN)VariableStoreBase;
+ VariableStoreLength = VariableStoreHeader->Size;
+
+ //
+ // Check if the free area is really free.
+ //
+ for (Index = mVariableModuleGlobal->NonVolatileLastVariableOffset; Index < VariableStoreLength; Index++) {
+ Data = ((UINT8 *) mNvVariableCache)[Index];
+ if (Data != 0xff) {
+ //
+ // There must be something wrong in variable store, do reclaim operation.
+ //
+ Status = Reclaim (
+ mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase,
+ &mVariableModuleGlobal->NonVolatileLastVariableOffset,
+ FALSE,
+ NULL
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+ break;
+ }
+ }
+
+ //
+ // Authenticated variable initialize.
+ //
+ Status = AutenticatedVariableServiceInitialize ();
+
+ return Status;
+}
+
+
+/**
+ Initializes variable store area for non-volatile and volatile variable.
+
+ @retval EFI_SUCCESS Function successfully executed.
+ @retval EFI_OUT_OF_RESOURCES Fail to allocate enough memory resource.
+
+**/
+EFI_STATUS
+VariableCommonInitialize (
+ VOID
+ )
+{
+ EFI_STATUS Status;
+ VARIABLE_STORE_HEADER *VolatileVariableStore;
+ VARIABLE_STORE_HEADER *VariableStoreHeader;
+ VARIABLE_HEADER *NextVariable;
+ EFI_PHYSICAL_ADDRESS TempVariableStoreHeader;
+ EFI_PHYSICAL_ADDRESS VariableStoreBase;
+ UINT64 VariableStoreLength;
+ UINTN ScratchSize;
+ UINTN VariableSize;
+
+ //
+ // Allocate runtime memory for variable driver global structure.
+ //
+ mVariableModuleGlobal = AllocateRuntimeZeroPool (sizeof (VARIABLE_MODULE_GLOBAL));
+ if (mVariableModuleGlobal == NULL) {
+ return EFI_OUT_OF_RESOURCES;
+ }
+
+ InitializeLock (&mVariableModuleGlobal->VariableGlobal.VariableServicesLock, TPL_NOTIFY);
+
+ //
+ // Note that in EdkII variable driver implementation, Hardware Error Record type variable
+ // is stored with common variable in the same NV region. So the platform integrator should
+ // ensure that the value of PcdHwErrStorageSize is less than or equal to the value of
+ // PcdFlashNvStorageVariableSize.
+ //
+ ASSERT (PcdGet32 (PcdHwErrStorageSize) <= PcdGet32 (PcdFlashNvStorageVariableSize));
+
+ //
+ // Allocate memory for volatile variable store, note that there is a scratch space to store scratch data.
+ //
+ ScratchSize = MAX (PcdGet32 (PcdMaxVariableSize), PcdGet32 (PcdMaxHardwareErrorVariableSize));
+ VolatileVariableStore = AllocateRuntimePool (PcdGet32 (PcdVariableStoreSize) + ScratchSize);
+ if (VolatileVariableStore == NULL) {
+ FreePool (mVariableModuleGlobal);
+ return EFI_OUT_OF_RESOURCES;
+ }
+
+ SetMem (VolatileVariableStore, PcdGet32 (PcdVariableStoreSize) + ScratchSize, 0xff);
+
+ //
+ // Initialize Variable Specific Data.
+ //
+ mVariableModuleGlobal->VariableGlobal.VolatileVariableBase = (EFI_PHYSICAL_ADDRESS) (UINTN) VolatileVariableStore;
+ mVariableModuleGlobal->VolatileLastVariableOffset = (UINTN) GetStartPointer (VolatileVariableStore) - (UINTN) VolatileVariableStore;
+ mVariableModuleGlobal->FvbInstance = NULL;
+
+ CopyGuid (&VolatileVariableStore->Signature, &gEfiAuthenticatedVariableGuid);
+ VolatileVariableStore->Size = PcdGet32 (PcdVariableStoreSize);
+ VolatileVariableStore->Format = VARIABLE_STORE_FORMATTED;
+ VolatileVariableStore->State = VARIABLE_STORE_HEALTHY;
+ VolatileVariableStore->Reserved = 0;
+ VolatileVariableStore->Reserved1 = 0;
+
+ //
+ // Get non-volatile varaible store.
+ //
+
+ TempVariableStoreHeader = (EFI_PHYSICAL_ADDRESS) PcdGet64 (PcdFlashNvStorageVariableBase64);
+ if (TempVariableStoreHeader == 0) {
+ TempVariableStoreHeader = (EFI_PHYSICAL_ADDRESS) PcdGet32 (PcdFlashNvStorageVariableBase);
+ }
+ VariableStoreBase = TempVariableStoreHeader + \
+ (((EFI_FIRMWARE_VOLUME_HEADER *)(UINTN)(TempVariableStoreHeader)) -> HeaderLength);
+ VariableStoreLength = (UINT64) PcdGet32 (PcdFlashNvStorageVariableSize) - \
+ (((EFI_FIRMWARE_VOLUME_HEADER *)(UINTN)(TempVariableStoreHeader)) -> HeaderLength);
+
+ mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase = VariableStoreBase;
+ VariableStoreHeader = (VARIABLE_STORE_HEADER *)(UINTN)VariableStoreBase;
+ if (GetVariableStoreStatus (VariableStoreHeader) != EfiValid) {
+ Status = EFI_VOLUME_CORRUPTED;
+ DEBUG((EFI_D_INFO, "Variable Store header is corrupted\n"));
+ goto Done;
+ }
+ ASSERT(VariableStoreHeader->Size == VariableStoreLength);
+
+ //
+ // Parse non-volatile variable data and get last variable offset.
+ //
+ NextVariable = GetStartPointer ((VARIABLE_STORE_HEADER *)(UINTN)VariableStoreBase);
+ while (IsValidVariableHeader (NextVariable)) {
+ VariableSize = NextVariable->NameSize + NextVariable->DataSize + sizeof (VARIABLE_HEADER);
+ if ((NextVariable->Attributes & (EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_HARDWARE_ERROR_RECORD)) == (EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_HARDWARE_ERROR_RECORD)) {
+ mVariableModuleGlobal->HwErrVariableTotalSize += HEADER_ALIGN (VariableSize);
+ } else {
+ mVariableModuleGlobal->CommonVariableTotalSize += HEADER_ALIGN (VariableSize);
+ }
+
+ NextVariable = GetNextVariablePtr (NextVariable);
+ }
+
+ mVariableModuleGlobal->NonVolatileLastVariableOffset = (UINTN) NextVariable - (UINTN) VariableStoreBase;
+
+ //
+ // Allocate runtime memory used for a memory copy of the FLASH region.
+ // Keep the memory and the FLASH in sync as updates occur
+ //
+ mNvVariableCache = AllocateRuntimeZeroPool ((UINTN)VariableStoreLength);
+ if (mNvVariableCache == NULL) {
+ Status = EFI_OUT_OF_RESOURCES;
+ goto Done;
+ }
+ CopyMem (mNvVariableCache, (CHAR8 *)(UINTN)VariableStoreBase, (UINTN)VariableStoreLength);
+ Status = EFI_SUCCESS;
+
+Done:
+ if (EFI_ERROR (Status)) {
+ FreePool (mVariableModuleGlobal);
+ FreePool (VolatileVariableStore);
+ }
+
+ return Status;
+}
+
+
+/**
+ Get the proper fvb handle and/or fvb protocol by the given Flash address.
+
+ @param[in] Address The Flash address.
+ @param[out] FvbHandle In output, if it is not NULL, it points to the proper FVB handle.
+ @param[out] FvbProtocol In output, if it is not NULL, it points to the proper FVB protocol.
+
+**/
+EFI_STATUS
+GetFvbInfoByAddress (
+ IN EFI_PHYSICAL_ADDRESS Address,
+ OUT EFI_HANDLE *FvbHandle OPTIONAL,
+ OUT EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL **FvbProtocol OPTIONAL
+ )
+{
+ EFI_STATUS Status;
+ EFI_HANDLE *HandleBuffer;
+ UINTN HandleCount;
+ UINTN Index;
+ EFI_PHYSICAL_ADDRESS FvbBaseAddress;
+ EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL *Fvb;
+ EFI_FIRMWARE_VOLUME_HEADER *FwVolHeader;
+ EFI_FVB_ATTRIBUTES_2 Attributes;
+
+ //
+ // Get all FVB handles.
+ //
+ Status = GetFvbCountAndBuffer (&HandleCount, &HandleBuffer);
+ if (EFI_ERROR (Status)) {
+ return EFI_NOT_FOUND;
+ }
+
+ //
+ // Get the FVB to access variable store.
+ //
+ Fvb = NULL;
+ for (Index = 0; Index < HandleCount; Index += 1, Status = EFI_NOT_FOUND, Fvb = NULL) {
+ Status = GetFvbByHandle (HandleBuffer[Index], &Fvb);
+ if (EFI_ERROR (Status)) {
+ Status = EFI_NOT_FOUND;
+ break;
+ }
+
+ //
+ // Ensure this FVB protocol supported Write operation.
+ //
+ Status = Fvb->GetAttributes (Fvb, &Attributes);
+ if (EFI_ERROR (Status) || ((Attributes & EFI_FVB2_WRITE_STATUS) == 0)) {
+ continue;
+ }
+
+ //
+ // Compare the address and select the right one.
+ //
+ Status = Fvb->GetPhysicalAddress (Fvb, &FvbBaseAddress);
+ if (EFI_ERROR (Status)) {
+ continue;
+ }
+
+ FwVolHeader = (EFI_FIRMWARE_VOLUME_HEADER *) ((UINTN) FvbBaseAddress);
+ if ((Address >= FvbBaseAddress) && (Address < (FvbBaseAddress + FwVolHeader->FvLength))) {
+ if (FvbHandle != NULL) {
+ *FvbHandle = HandleBuffer[Index];
+ }
+ if (FvbProtocol != NULL) {
+ *FvbProtocol = Fvb;
+ }
+ Status = EFI_SUCCESS;
+ break;
+ }
+ }
+ FreePool (HandleBuffer);
+
+ if (Fvb == NULL) {
+ Status = EFI_NOT_FOUND;
+ }
+
+ return Status;
+}
+
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